2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

静電選別におけるポリスチレンの高精度選別技術の開発
Development of High Precision Sorting Technology of Polystyrene
in Electrostatic Separation〇黒田真司*, 西川祐介*, 三木伸介*, 平田靖典**〇黒田真司*, 西川祐介*, 三木伸介*, 平田靖典**〇Shinji KURODA*, Yusuke, NISHIKAWA*, Shinsuke MIKI*, Yasunori HIRATA**
三菱電機株式会社 先端技術総合研究所*, リビングデジタルメディア事業部***MitsubishiElectric Corporation Advanced Technology R&D Center, **Living Digital MediaBusiness Division

Abstract:
Electrostatic separation, which is one of the plastic sorting steps, is a sorting method
using the difference in charge polarity generated when different types of plastic are rubbed.
In electrostatic separation, fluctuation in the mixing ratio of plastic affects the charge amount,which influences the efficiency of separating. In this investigation, we tested the electrostatic
sorting in changing the PS (polystyrene) : PP (polypropylene) ratio in the plastics mixturesand evaluated the weight distributions of each of the sorted PS and PP by fitting with
Gaussian function. We clarified the relationship between the PS : PP ratio in the plastics
mixtures and the fall distribution of each sorted plastic. From this result, we made it possible
to predict the fall distribution of each plastic in changing the mixing ratio. By manipulating
the position of the partition plate of the collection box according to the mixing ratio, it ispossible to raise the recovery rate.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

江戸時代における静電気の考え方
Concept of Electrostatics in Edo Period
西村 亮西村 亮
Ryo NISHIMURA
鳥取大学工学部
Faculty of Engineering, Tottori University

Abstract:
It is described in this paper that how electrostatic and its phenomena are explainedin Edo period. Friction generators (Erekiteru) are introduced to Japan in late 18th century,
ten several years after Benjamin Franklin discovered that the thunder is electrostatic
phenomenon, from Europe. Japanese intellect of that time heard of that thunder and theessence of phenomena occurring when operating friction generators are same. Of course
they did not know the “Modern electrostatic concept” such as frictional charging phenomena
explained by work function. Some of them called “essence of electricity” chi and tried to
explain the electrostatic phenomena by using Yin-Yang theory. A Japanese word “denki”
began to be used by 1854 at the latest.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

有機溶剤噴霧による 2 流体ノズルの帯電Electrification of two-fluid nozzle by spraying organic solvent
遠藤雄大遠藤雄大
Yuta ENDO
労働安全衛生総合研究所
National Institute of Occupational Safety and Health, Japan (JNIOSH)

Abstract:
The spray electrification of liquid sprayed from a two-fluid nozzle (SUS303) wereexperimentally investigated. The effects of conductivity were examined with the low
conductivity liquid (mineral spirit) by adding the conductivity improving additive (Statsafe3000) and it varied from 10-11 to 10-6 S/m. The specific charge (charge per mass of splayed
liquid) of the nozzle depended strongly on the conductivity and became maximum around10-7 S/m. In terms of the splaying method, the specific charge of the two-fluid nozzle
became larger by about two figures as compared with that of the one-fluid nozzle (SUS303)
in all the conductivities.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

アミノ酸粉体の静電気放電による着火性評価
Experimental study on electrostatic spark ignitability of amino acidpowders〇加藤智規*,土屋仁志*,崔光石**,金佑勁***〇加藤智規*,土屋仁志*,崔光石**,金佑勁***〇Tomonori KATO*, Hitoshi TSUCHIYA*, Kwangseok CHOI** and Wookyung KIM***〇味の素（株）バイオファイン研究所*,労働安全衛生総合研究所**,広島大学大学院工学研究科***〇*Ajinomoto Co., Inc., **JNIOSH, ***Hiroshima Univ.

Abstract:
This paper reports the experimental results dealing with minimum ignition energies(MIE) of five kinds of amino acids (Glycine, L-Alanine, L-Valine, L-Leucine and L-Isoleucine).
The MIE of Glycine which was over 300 mJ, was the highest out of the powders used in thisstudy. This value obtained is relatively safe for electrostatic risk assessments in the industry.
On the other hand, L-Alanine, L-Valine, L-Leucine and L-Isoleucine were sensitive that evena spark with very low energy, such as about 4 mJ, could ignite them. Therefore, these
powders must be carefully handled in the industrial process.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

静電気力を用いた顆粒剤の吸着特性
Adsorption Characteristics of Granules using an Electrostatic Force○田中 醇＊，杉本 俊之＊○田中 醇＊，杉本 俊之＊Jun TANAKA＊，Toshiyuki SUGIMOTO＊
山形大学大学院＊
Yamagata University

Abstract:
A capsule medicine includes particular amount of granular medicine. If the numberof filling granules can be controlled, custom-made capsule medicine can be prepared forpatients with ordered ingredients and ordered number of granules. The purpose of thisresearch is to pick-up granules with controlled number by a principle of electrostatic
chucking. The prototype electrostatic adsorption device called U-type electrode wasprepared for picking up granules ranging from 710 mm to 850 mm. The electrode iscomposed of a high voltage electrode with by providing an insulating coating layer partly
covered with grounded conductive layer. The granules are adsorbed on the insulating layer
by the electrostatic force acting between the high voltage electrode and the granules. The
adsorped number of granules were counted with changing width and length of the insulating
layer，di and dU. The number of granules was found be a function of di and dU

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

大気圧誘電体バリア放電を用いたアンモニア貯蔵物質の合成及び試料分析
Synthesis and sample analysis of ammonia storage materials using
atmospheric pressure dielectric barrier discharge〇全俊豪, 阿部哲也〇全俊豪, 阿部哲也
Shungo ZEN and Tetsuya ABE
東京工業大学 工学院電気電子系
Tokyo Institute of Technology

Abstract:
As global warming issues continue to intensify and traditional fossil fuels continue
to be consumed, there is increasing demand for new energy sources. Hydrogen plays animportant role in energy storage systems which are supposed to substitute for traditional
fossil fuels, and NH3 is promising hydrogen storage material due to its high hydrogen density.
In our previous research, Mg3N2 has been proposed as an NH3 storage material. In thispaper, we focused on the direct synthesis of Mg3N2 by nitridation of MgO via atmosphericpressure dielectric barrier discharge (DBD) plasma in which mix of nitrogen and hydrogen
was used as reaction gas at room temperature. This method only requires simple apparatus
and does not cause decomposition of NH3.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

広帯域能動型平衡不平衡変換器の設計開発(1)Design and development of broadband active-balun Part 1○石上 忍，鈴木滉太, 川又 憲○石上 忍，鈴木滉太, 川又 憲
○Shinobu ISHIGAMI, Kota SUZUKI and Ken KAWAMATA
東北学院大学
Tohoku Gakuin University

Abstract:
Many of the antennas for measuring electromagnetic fields, especially thebroadband antennas for EMI measurements, are balanced feed type such as dipole
antennas. However, since the input port of instruments such as spectrum analyzers andoscilloscopes are unbalanced, a balanced-unbalance transformer (balun) is required toconnect the antenna and the instrument. In the EMI measurements at frequency range
below 30 MHz, it is usually difficult to measure electric field strength with high sensitivity, so
magnetic field strength is usually measured. In this study, we design and develop a
broadband balun used for an antenna to measure electric field strength below 30 MHz inhigh sensitivity and broadband. Furthermore, prototypes are fabricated, and theircharacteristics are evaluated.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

球電極 ESD に伴う近傍過渡磁界の測定と磁界ピーク値の距離特性に関する考察
Measurement of Transient Magnetic Field and Consideration on
Distance Characteristics of Magnetic Field Peak Value Caused by
ESD in Sphere Gap
加藤健人＊,〇川又憲＊,石上忍＊,藤原修＊＊加藤健人＊,〇川又憲＊,石上忍＊,藤原修＊＊
Kent KATO*, 〇Ken KAWAMATA*, Shinobu ISHIGAMI and Osamu FUJIWARA**
東北学院大学＊,名古屋工業大学＊＊*Graduate School of Engineering, Tohoku Gakuin University**Nagoya Institute of Technology

Abstract:
Distance characteristics of transient magnetic field caused by a micro gap ESD in
sphere gap was studied experimentally to discuss the EM radiation mechanism due to ESDs.
Firstly, a measurement system of wideband transient magnetic field was set up using ashielded loop probe. For the probe with a nominal bandwidth of 6 GHz, the probe correction
factors up to a frequency bandwidth of 20 GHz were obtained from the three-antenna
method. Next, the correction factor was applied to the measured output voltage waveforms
to determine the peak value of the transient magnetic field. As a result, the peak value ofmagnetic field strength was about 700 A/m in the spherical electrodes in diameter of 70 mm,
and the magnetic field strength varied depending on the size of the spherical electrode.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019窒素プラズマ照射による Fe-Co 箔の窒化
Nitriding of Fe-Co foil Irradiated with Nitrogen plasma〇矢澤翔大*, 中野裕悟*，萩原涼*，片桐正人*，江頭雅之*，工藤祐輔*，黒岩孝*，新妻清純*〇
矢澤翔大*, 中野裕悟*，萩原涼*，片桐正人*，江頭雅之*，工藤祐輔*，黒岩孝*，新妻清純*〇Shota YAZAWA* 1, Yugo NAKANO*, Ryo HAGIWARA*, Masato KATAGIRI*,
Masayuki EGASHIRA*, Yusuke KUDO*, Takashi KUROIWA*, Kiyozumi NIIZUMA*
日本大学生産工学部電気電子工学科
Department of Electrical and Electronic Engineering, College of Industrial Techology, Nihon
University

Abstract:
This paper tried nitriding of Fe-Co foil plasma irradiation method, and examined fromthe view of the process to preparation and the crystal structure and magnetic property of the
prepared sample. In this study, we first tried the plasma nitriding treatment in theN2+30%H2 mixed gas atmosphere which was the conventional condition which was donein the previous research, but from the measurement result of the XRD and the VSM, thepreparation of the Fe-Co alloy didn’t confirmed. Based on this result, we proposed toirradiate Fe-Co foil with nitrogen plasma in N2+30%H2 mixed gas atmosphere after plasma
irradiation in Ar gas atmosphere different from the conventional method. The results weresummarized as follows. After the Ar plasma irradiation which was the proposed nitriding
treatment method, nitriding treatment was successfully performed by plasma irradiation with
N2+30%H2 gas, and formation of γ-austenite was observed in addition to the Fe-Co peak.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

発酵廃液蒸留水中の有機酸除去を目指した DBD による水蒸気中の有機酸分解
Degradation of organic acids in steam by DBD for elimination oforganic acids in the water distilled from the fermentation wastewater〇谷野孝徳＊、＊＊，松井雅義＊, 渋木一晃＊＊＊，大嶋孝之＊、＊＊〇谷野孝徳＊、＊＊，
松井雅義＊, 渋木一晃＊＊＊，大嶋孝之＊、＊＊〇Takanori TANINO＊, ＊＊, Masayoshi MATSUI＊, Kazuaki SHIBUK＊＊＊,Takayuki
OHSHIMA＊ , ＊＊群馬大学大学院理工学府＊, 群馬大学食健康科学教育研究センター＊＊,味の素株式会社＊＊＊＊Graduate School of Science and Technology, Gunma University, ＊＊Gunma University
Center for Food Science and Wellness (GUCFW), ＊＊＊Ajinomoto Co., Inc.

Abstract:
In water recycle of fermentation industry, contamination of distilled water fromfermentation waste water by volatile organic acids, that produced as the by-product offermentation, makes it difficult to reuse distilled water because organic acids inhibit thefermentation of microorganisms. In this study, degradation of organic acids in distilled steam
by dielectric barrier discharge (DBD) was investigated. DBD treatment of steam, in otherwords, generation of DBD under steam atmosphere successfully degraded organic acids
and degradation efficiency depended on retention time of steam in DBD reactor. In theexperiment using propionic acid, almost all of total organic carbon was removed from thedistilled water within 60 msec retention time. The chromatogram of HPLC analysis using
DBD treated distilled solution with t = 15 msec showed the production of organic acids
possessing shorter carbon chain as the intermediate of degradation.
The end of the abstract. This font is times roman 11 points.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

大気圧プラズマ照射による絶縁物表面の帯電Charging on dielectric surface by atmospheric plasma treatment〇清水鉄司＊,菊永和也＊＊, 榊田創＊〇清水鉄司＊,菊永和也＊＊, 榊田創＊
〇Tetsuji SHIMIZU*, Kazuya KIKUNAGA* and Hajime SAKAKITA**
産総研電子光 RI＊, 産総研製造技術 RI＊＊
*Electronics and Photonics Research Institute, AIST, **Advanced Manufacturing ResearchInstitute, AIST

Abstract:
Low temperature atmospheric plasmas have been widely used in many application
areas including medicine and agriculture. Plasma jet is one of the low temperature
atmospheric plasma sources. In this abstract, we treated dielectric surface by helium plasma
jet and a potential distribution on the dielectric surface was measured using an array ofcapacitance type sensors. The helium flow rate for plasma production was 2.0 l/min and thepower consumption was about 1.4 W. We found that the surface was charged-up positively
in average and the potential distribution has a donut shape. We will discuss the charging
mechanism with distribution of charged particles above the surface.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

帯電した絶縁膜表面の水分層が沿面放電の進展に及ぼす効果
Effect of Water Layer on the Propagatinon of Brush Discharge
Occurring at the Surface of a Charged Film
○二階堂慎一＊，杉本俊之＊，佐藤岳彦＊＊○二階堂慎一＊，杉本俊之＊，佐藤岳彦＊＊○Shinichi NIKAIDO*, Toshiyuki SUGIMOTO*, Takehiko SATO**
山形大学大学院＊，東北大学＊＊*Graduated School of Science and Engineering, yamagata University, **Insitute of Fluid
Science, Tohoku University

Abstract:
A propagating brush discharge (PBD) is one of the electrostatic discharge
phenomena occurring at the surface of strongly charged insulator film with backing ground.
This paper describes the measurement of induction current to detect the flow of static charge
in developing PBD. The experiments were performed using strongly charged hydrophobic
and hydrophilic film to clarify the effect of water layer on the films. The hydrophilic film
includes thin water layer on its surface. Experimental results show that there is a significant
difference in the induction current of PBD between hydrophobic and hydrophilic films. The
induction current of the hydrophilic film might be affected by the low resistance of thestreamer due to the presence of water layer in the streamer channel.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

静電気火花放電の電位差・距離・分光の同時測定
Simultaneous measurements of potential difference, breakdown
distance, and spectrum of electrostatic spark discharge
三浦崇三浦崇Takashi MIURA(独)労働者健康安全機構労働安全衛生総合研究所
National Institute of Occupational Safety and Health

Abstract:
For the development of a practical method to estimate the energy of electrostatic air
discharge without electrical measurements, the dependence of spectral characteristics oflight emission from the spark discharge on electrostatic energy has been investigated. It was
found from the experimental measurements that the relative light intensity emitted from amonovalent positive ion of nitrogen (N II) to a nitrogen atom (N I) increased with theelectrostatic energy from 0.02 mJ to 30 mJ. Furthermore, simultaneous measurements ofthe potential difference (voltage), the gap length of the spark, and the spectrum revealed
that the intensity ratio, N II/N I, becomes large when increasing the electrostatic energy
divided by the breakdown gap length ,i.e., spatial energy density.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

アーク加熱式過熱水蒸気生成に適したコロナ放電電極の形状と配置の検討
Investigation of shape and arrangement of Corona Electrodeapplying for
Generating Superheated Steam using Arc Heating
姉崎直人, 杉本俊之姉崎直人, 杉本俊之
Naoto ANEZAKI and Toshiyuki SUGIMOTO
山形大学大学院 理工学研究科
Graduated School of Science and Engineering, Yamagata University

Abstract:
Conventional superheated steam generating apparatus can be divided into steam
generation unit and steam heating unit. The apparatus intrinsically becomes large setup,
and there are disadvantage in terms of efficiency and cost. The final goal of this research is
to develop a compact and highly efficient superheated steam generator using arc heatingwith corona charging system. An outlet of a cylindrical copper electrode is heated by arc
discharge to heat up saturated steam transported by corona ion. The temperature of thetarget heated by the superheated steam was measured by changing the shape andinstallation position of the corona charging electrode. It was found that pattern of corona ion
flow significantly affect the heating temperature.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

静電吸着式ロールクリーナーのホコリ吸着等価回路モデル
An equivalent circuit model of dust removal for an electrostatic rollcleaner○古屋佑樹, 杉本俊之○古屋佑樹, 杉本俊之
○Yuki FURUYA and Toshiyuki SUGIMOTO
山形大学大学院 理工学研究科
Yamagata University

Abstract:
In house cleaning, dust is generally removed by a vacuum cleaner which may cause
allergic symptoms due to the disturbance of air including tiny dust or pollen. The purpose ofthis research is to develop a roll type cleaner that can easily remove dust using electrostaticforce without an air flow. In this paper, we proposed an equivalent circuit model and its
theoretical electrostatic absorption force. The adsorption characteristic were obtained
experimentally by the collection rate of cotton threads chosen as dust. The collection rate
for different base materials on which the dust was prepared showed good agreement withthe theoretically predicted force. The surface resistance of the base material was found tobe significantly important to obtain high collection rate.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

非接触型体積抵抗測定法による塗装鋼板上の樹脂膜劣化度評価
Evaluating a degree of deterioration for coated steel panel
by non-contact type volume resistance measurement〇大友涼*, 杉本俊之*，野村信雄**〇大友涼*, 杉本俊之*，野村信雄**〇Ryo OTOMO* and Toshiyuki SUGIMOTO*，Nobuo NOMURA**
山形大学大学院 理工学研究科*，春日電機(株)**Yamagata University*, KASUGA DENKI.INC**

Abstract:
It is well known that the deteriorated polymer materials become wettable, resulting
in poor insulating performance. In this work, we tried to evaluate the degree of deteriorationof the polymer by evaluating the insulating performance. A needle to cylinder corona charger
and surface voltmeter were located on the target polymer sample with back grounding metal
coated steel panel. The surface potential made by the charger were measured during andafter the charging process. It was confirmed that the surface potential of the deteriorated
sample was lower than new sample, because of its rich water content. Due to the optimum
electrode setup, the potential difference between the new and the deterioreted sample
becomes significant.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

誘電体バリア放電式オゾン発生器における放電の円相当直径分布とオゾン生成特性の関係
Relation between equivalent area circle diameter distribution ofdischarge
and ozone yield by dielectric barrier discharge type ozone generator〇鈴木涼平＊，西脇昂平＊＊, 小林敬季＊＊, 大澤直樹＊＊, 吉岡芳夫＊＊,
田口正樹＊＊＊, 河井茂充＊＊＊, 青木未知子＊＊＊, 大戸時喜雄＊＊＊〇鈴木涼平＊，西脇昂平＊＊, 小林敬季＊＊, 大澤直樹＊＊, 吉岡芳夫＊＊,
田口正樹＊＊＊, 河井茂充＊＊＊, 青木未知子＊＊＊, 大戸時喜雄＊＊＊〇Ryohei SUZUKI＊, Kohei NISHIWAKI＊＊, Hiroki KOBAYASHI＊＊, Naoki OSAWA＊＊,
Yoshio Yoshioka＊＊, Masaki TAGUCHI＊＊＊, Shigemitsu KAWAI＊＊＊, Michiko AOKI＊＊＊,Tokio OHTO＊＊＊
金沢工大院工＊，金沢工大工＊＊，メタウォーター＊＊＊＊Graduate Program in Electrical Engineering and Electronics, Kanazawa Institute ofTechnology,＊＊Department of Electrical and Electronic Engineering, Kanazawa Institute ofTechnology,＊＊＊METAWATER Co., Ltd.

Abstract:
In this study, the relation between ozone yield and discharge appearance wasinvestigated by a dielectric barrier discharge type ozone generator and an image processing
software. As a result, ozone yield increased with decreasing cooling water temperature of
the SUS electrode, however, ozone yield did not change by changing gas pressure. From
the analysis of discharge photographs, we confirmed that the size of the equivalent area
circle diameter of the discharge decreased with decreasing cooling water temperature andthe frequency of small discharge occurrence increased with decreasing cooling watertemperature.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

直流コロナ放電を用いた難分解性有機化合物の分解における液相化学
反応過程の数値解析
Numerical Analysis for Decomposition of Persistent Organic
Compoundsin Water Using DC Corona Discharge〇川端唯斗, 眞銅雅子, 見市知昭〇川端唯斗, 眞銅雅子, 見市知昭
〇Yuito Kawabata, Masako Shindo, Tomoaki Miichi
大阪工業大学
Osaka Institute of Technology

Abstract:
The characteristics of acetic acid decomposition upon a negative DC corona
discharge over water are investigated. The corona discharge is 4 mm away from the water
surface. Further, we explore the mechanisms involved in the chemical reactions of active
species during water treatment using discharged plasma. During processing, oxygen or
ozone were supplied to the reactor. The experiment and the simulation show the acetic acidconcentration phenomenon of the same tendency. Therefore it is thought that the simulation
model considering only the reaction of ozone and hydrogen peroxide can confirm the acetic
acid concentration change.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

成形炭素電極を用いた正コロナ放電によるにおい物質低減に関する研究
Odor Reduction with Positive Corona Discharge using Formed
Carbon Electrode○川田吉弘、大川翔太郎、清水洋隆○川田吉弘、大川翔太郎、清水洋隆
Yoshihiro KAWADA, Syoutarou OKAWA and Hirotaka SHIMIZU
職業能力開発総合大学校
Polytechnic University of Japan

Abstract:
The odor compounds are evaporated to form a gaseous or fine particles state when
the odor compounds are diffused in the room air. Therefore, a positive corona discharge witha wire-to-plate electrode structure like an electrostatic precipitator are considered that aneffective for the odor removal. In this study, the grounded electrodes in the positive corona
discharge were used two material, a stainless-steel and a woodceramics. The
woodceramics has electric conductivity and porous structure. The target for removal was βphenylethyl alcohol in a closed space. The β-phenylethyl alcohol were measured with a gas
chromatography with FID and splitless injection method. In addition, the thermal desorption
type absorb was used with the gas sampling. As results, the β-phenylethyl alcohol were
removed from the air with the positive corona discharge. In addition, the reduction rate wasincreased, and the by-products were decreased with using the woodceramics electrodecompared with stainless-steel electrode.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

絶縁材料の表面抵抗測定のための新電極構成
New Designed Electrode Arrangement
for a Measurement of Surface Resistance of Insulating Material
前田孝夫*，〇山野芳昭**前田孝夫*，〇山野芳昭**
Takao Maeda* and 〇Yoshiaki YAMANO**
絶縁テクノ工房*，千葉大学***Techno-lab on Electrical Insulation**Chiba University

Abstract:
The new electrode arrangement for the measurement of resistance along thesurface of insulating material is presented. The new electrode arrangement was originallydesigned by the authors of this report. The normal components of the current to the surface
are reduced by the new arrangement in order to diminish the current flowing to the backside
electrode in the conventional electrode arrangement used in IEC standard. The
measurements of surface current using the new electrode arrangement were carried out toconfirm the effectiveness of the measured values to the evaluation of surface resistivity of
insulating materials. The consideration on the measured results using computer analysis
reveals that the surface resistance obtained by the new electrode arrangement can reflect
to the evaluation of surface resistance with higher reliably than the conventionalarrangements. The new electrode arrangement can also be applied to the surface treatedto avoid the electrostatic charge accumulation.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

ナノ秒パルス放電方式オゾナイザにおける余剰エネルギーの低減化
Excess energy reduction on nanosecond pulsed discharge basedozonizer〇佐々木 貫至*，日高 寛貴*，森 皓亮**，王 斗艶***，浪平 隆男***〇佐々木 貫至*，日高
寛貴*，森 皓亮**，王 斗艶***，浪平 隆男***〇Kanji SASAKI*, Hiroki HIDAKA*, Teruaki MORI**, Douyan WANG***, and Takao
NAMIHIRA***熊本大学大学院自然科学教育部*，熊本大学工学部情報電気電子工学科**，熊本大学パルス
パワー科学研究所****Graduate School of Science and Technology, Kumamoto University, **Department ofComputer Science and Electrical Engineering, and ***Institute of Pulsed Power Science,
Kumamoto University

Abstract:
Ozone has very strong oxidizability far better than chlorine, and it has no residual
toxicity due to natural decomposition into oxygen. Therefore, ozone finds a wide variety of
applications such as sterilization, deodorization, decoloration, bleach, and so on. In ourearlier research, nanosecond (ns) pulsed discharge based ozonizer which has beendeveloped in recent years has achieved the higher ozone generation yield than the otherdischarge methods. However, the ozone concentration formed by the ns pulsed discharge
saturates at approximately 40 g/m3. It is assumed that the main cause of the saturation ofozone is a thermal decomposition of ozone due to a transition of the discharge mode to anarc discharge. The result shows that the oscillation of the pulse wave due to an imperfectmatching between the generator and a discharge reactor was suspected as the cause of
the arc discharge. Therefore, a resistor for absorbing excess energy was connected to theend of the reactor in order to prevent the oscillation. In this study, the effect of the transitionof the discharge mode and ozone concentration were investigated.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

リチウムイオン電池正極材リサイクルを目的とした電気パルスによる選
択的解体
Selective dismantlement by electrical discharge for recycling oflithium-ion battery positive electrode material〇丸山修平＊, 澤村幸宏＊, 近藤正隆＊,林秀原＊, 浪平隆男＊＊, 大和田秀二＊, 所千晴＊〇丸山修平＊, 澤村幸宏＊, 近藤正隆＊,林秀原＊, 浪平隆男＊＊, 大和田秀二＊, 所千晴＊〇Shuhei MARUYAMA*, Yukihiro SAWAMURA*, Masataka KONDO*,Soowon LIM*, Takao
NAMIHIRA**, Shuji Owada*, Chiharu TOKORO*
早稲田大学＊, 熊本大学＊＊* Faculty of Science and Engineering, Waseda University,** Institute of Pulsed Power
Science, Kumamoto University

Abstract:
It is expected that a large amount of Lithium-Ion Battery (LIB) is disposed in theforeseeable future. A novel recycling method is needed to realize material reuse/recyclingof LIB. The positive electrode of the LIB contains cobalt-based compound called the active
material and has three-layer structure consist of two positive electrode active material layers
and an aluminum base layer. The objective of this study is to selectively recovery the positiveelectrode active material from the LIB positive electrode by an electrical disintegration
method. Discharge electrodes were set on the active material. A capacitor bank of 2.4μF
was charged up to 45 kV. After discharge experiment, particle size distribution and element
ratio were evaluated. It was confirmed that the active material layers and aluminum layer
were successfully separated enough to recycle cobalt/nickel and aluminum.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

プラズマキャンドル：大気圧ヘリウム
プラズマジェットのスケーリングアップ
Plasma Candle: Scaling-up of Atmospheric Pressure Helium
Plasma Jet
金賢夏,寺本慶之, 竹内希, 尾形敦金賢夏,寺本慶之, 竹内希, 尾形敦
Hyun-Ha KIM, Yoshiyuki TERAMOTO, Nozomi TAKEUCHI, and Atsushi OGATA
国立研究開発法人産業技術総合研究所
National Institute of Advanced Industrial Science and Technology
Tokyo Institute ofTechnology

Abstract:
Plasma het has been intensively studied in the last decade, and A new type of
atmospheric-pressure plasma jet, referred to as plasma candle hereafter, has beendeveloped. By using a multi-hole tube (honeycomb type) or a porous ceramic plate, we
demonstrated that plasma jet can be established with the diameter larger than 20 mm.
Preliminary results on the effect of tube geometry, gas flow rate, applied voltage and theireffect on plume shape and temperature will be discussed.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

Quantitative analysis of the influences of gas temperature on
nitrogen fixation in nano-pulsed DBD
Quantitative analysis of the influences of gas temperature on
nitrogen fixation in nano-pulsed DBD
Ayman A. ABDELAZIZ , Hyun-Ha KIMAyman A. ABDELAZIZ , Hyun-Ha KIM
Ayman A. ABDELAZIZ , Hyun-Ha KIM
国立研究開発法人産業技術総合研究所
National Institute of Advanced Industrial Science and Technology
Tokyo Institute ofTechnology

Abstract:
In this work, the effect of the gas temperature (in range of 300 – 600 K) on thenitrogen fixation in a DBD operated by a pulsed high-voltage was studied at different
humidity levels and oxygen contents. To fully understand the effect of the temperature on
the nitrogen fixation, its effect on the characterization of the DBD, including the currentvoltage waveforms and optical emission spectroscopy, was investigated.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

パルス電圧の立ち上がり速度とストリーマ放電特性の関係
Effect of the pulse voltage rise rate on the characteristics of thestreamer discharge〇小室淳史＊, 安藤晃＊〇小室淳史＊, 安藤晃＊
〇Atsushi KOMURO＊, Akira ANDO＊
東北大学工＊＊Department of electrical engineering, Tohoku University

Abstract:
Effect of pulse rise rate on a streamer discharge is investigated through simulations.
Pulsed voltages with various pulse rise rate are applied to point-to-plane electrodeconfigurations, and the propagation velocity, the diameter and the production amount ofO(3P) radical are calculated. The results show that as the pulse rise rate increases, there isan increase in the discharge current, velocity of the primary streamer, and diameter of thestreamer channel. Additionally, the curvature of the point anode affects these parameters,
indicating that the applied voltage potential during the streamer propagation is important todetermine the streamer characteristics.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

誘電泳動インピーダンス計測におけるマイクロ櫛型平面電極の等価回路モデル
Equivalent Circuit Model of Micro Interdigitated Planar Electrodes inDielectrophoretic Impedance Measurenent System〇堀貴嗣，内田諭，杤久保文嘉〇堀貴嗣，内田諭，杤久保文嘉〇Takashi HORI, Satoshi UCHIDA, Fumiyoshi TOCHIKUBO
首都大システムデザイン
Faculty of Systems Design, Tokyo Metropolitan University

Abstract:
In this study, we examined an equivalent circuit model for accurate analysis ofdielectrophoretic impedance measurement (DEPIM), which is expected as a rapid andsimple bacterial detection technology. In addition, we considered the more accurateequivalent circuit model including the double layer capacity, the resistance and thecapacitance derived from the solvent and the electrode. In the theoretical value of the
impedance frequency characteristics, three areas could be confirmed as in the previous
research. Furthermore, we compared the theoretical values of the equivalent circuit with thecapacitance component derived from the SiO2 cover and the glass substrate inconsideration of actual use. The comparison results suggest that the SiO2 and the glass
have some influence on the impedance frequency characteristics. This result suggests that
we could obtain the significant result for future DEPIM experiment and analysis. In addition,
we constructed and evaluated a quadruple-layer ellipsoid model for E.coli, which is a moreaccurate model than the convention one.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

絶縁被覆接地電極の放電特性と荷電性能
Discharge Characteristics and Electric Charge Performance ofInsulation coating GND-electrodes〇永吉健太郎*,野﨑優介*,栗田加奈絵*,中村陽平*,江原由泰**〇永吉健太郎*,野﨑優介*,栗田
加奈絵*,中村陽平*,江原由泰**〇Kentaro NAGAYOSHI*, Yusuke NOZAKI*, Kanae KURITA*, Yohei NAKAMURA*,
Yoshiyasu EHARA**
富士通ゼネラル研究所*,東京都市大学**
Fujitsu General Laboratories Limited*, Tokyo City University**

Abstract:
An ionizer with insulation coating GND-electrodes was measured about a discharge
current characteristic, the electric charge performance and the ozone generation. For
collecting efficiency pulse electric charge was different from DC corona discharge andozone reduction was observed.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

異なる電極径を用いた放電によって生成された衝撃波の違い
Difference of shock waves generated by discharges with different
electrode diameters〇佐藤允彦*，高浦宏喜*，ホサノハミド*,**、佐久川貴志*,**〇佐藤允彦*，高浦宏喜*，ホサノハミ
ド*,**、佐久川貴志*,**〇Mitsuhiko Sato*、 Hiroki Takaura*、 Hamid Hosano*,**、 Takashi Sakugawa*,***熊本大学自然科学教育部, **熊本大学パルスパワー研究所*Graduate School of Science and Technology, Kumamoto University、**Institute of PulsedPower Science, Kumamoto University

Abstract:
In this study, we measured the pressure of shock waves generated by the discharge
with two different electrode diameters. We discharged by using a magnetic pulse
compression (MPC) circuit and a point-to-point electrode in the water of conductivity 50 mS/ cm. The shock waves were measured through an elastic membrane using a fiber optic
probe hydrophone (FOPH) pressure transducer. we analyzed the shock wave waveform.
The pressure value was averaged at every 100 points on the waveform, and curve fitting
was applied. As a result, the fall time of shock waves generated using discharges withdifferent electrode diameters are different.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

線対平板型電気集塵装置における粒子の帯電及び軌道解析
Simulation of particle charge and trajectory in a wire-to-plate typeelectrostatic precipitator〇伊藤航平＊, 田村亮太＊, 瑞慶覧章朝＊,川田吉弘＊＊,田岡智浩＊＊＊〇伊藤航平＊, 田村亮太＊, 瑞慶覧章朝＊,川田吉弘＊＊,田岡智浩＊＊＊〇Kohei ITO*, Ryota TAMURA*, Akinori ZUKERAN*, Yoshihiro KAWADA** andTomohiro TAOKA***
神奈川工科大学＊,職業能力開発総合大学校＊＊,住重プラントエンジニアリング株式会社＊＊＊* Kanagawa Institute of Technology** Polytechnic University of Japan*** Sumiju Plant Engineering Co.,Ltd.

Abstract:
The purpose of this study is to analyze particle charge and trajectory in a wire-toplate type electrostatic precipitator. The particle charge and trajectory in the gas flow
considered the ionic flow were calculated using the simulation software COMSOLMultiphysicsⓇ(Ver.5.4). The gas flow distribution and particle trajectory were measured
using particle tracking velocimetry (PTV). As a result, it was succeeded in analyzing particle
charge considering the spatial electric field and ionic density. The analysis result of theparticle trajectory near the grounded plate electrode was almost the same as experimental
result. However, the analysis result near the wire electrode did not agree with theexperimental result.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

水滴滴下時の微小水滴の発生
Ejection of tiny water droplets when water droplets are dripped on
an insulator○堀江史人，下川博文○堀江史人，下川博文
Fumito HORIE, Hirofumi SHIMOKAWA
神奈川工科大学
Kanagawa Institute of Technology

Abstract:
In this study, the behavior of water droplets was photographed using a high-speed
camera. The water droplets bounce completely on the superhydrophobic surface and tiny
water droplets may be ejected. The formation of tiny droplets are known to be related to
Coulomb repulsion and surface tension of water, but the details of the formation mechanism
is unknown. It has been found that tiny water droplets are released from droplets reaching
the Rayleigh limit by increasing the charge amount of the droplets as one of the ejection
mechanisms. However, in the case of a drop distance of 2 cm, when the water droplet is
not charged, a tiny water droplet is ejected with a probability of 100%. This paper mainly
describes the ejection mechanism of tiny water droplets under the conditions.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

電気穿孔後の生体膜を介したイオン輸送の特性
Ca ion transport through plasma membrane after electroporation○緒方拓海,卜部玄,島田雅治,勝木淳○緒方拓海,卜部玄,島田雅治,勝木淳
Ogata Takumi
熊本大学
Kumamoto University

Abstract:
Pulsed electric field (PEF) produces small pores on the cell membrane, so called“electroporation”, and the trans-membrane molecules transport occurs through the pores. In
this study, in order to clarify the environmental factors related to the trans-membrane iontransport, the Ca ion influx was observed by using artificial cells (giant unilamellar vesicles),which enable to adjust the osmotic pressure and the Ca ion concentration independently.
The experiment shows that the osmotic pressure and Ca concentration influences the Ca
influx after the electroporation.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

表面電位分布を用いた複合材料の評価方法
Evaluation Method of Composite Materials using Surface Potential
Distribution〇菊永和也, 寺崎正〇菊永和也, 寺崎正〇Kazuya KIKUNAGA and Nao TERASAKI
産総研
National Institute of Advanced Industrial Science and Technology

Abstract:
Composite materials can have excellent functions or performances that could not
be obtained alone by combining two or more materials with different physical properties, andthey are adapted to aircraft and automotive applications. A composite material composed ofpolyvinyl chloride film and conductive carbon coating were charged using directly applied
voltage of -100 ~ +100 V or corona discharge of 5kV, and the surface potential distributionof 30 mm × 30 mm was measured. We found that a high potential was able to be given to
the conductive part by applying voltage and corona discharge, and the position informationof the conductive part was able to be visualized using it.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

マイクロ波水プラズマの OH-LIF 計測
Measurement of OH Radical Density in Water Vapor Microwave
Excited Plasma Using Laser-Induced Fluorescence○井上樹＊, 小野亮＊, 相澤洸＊＊，石島達夫＊＊＊○井上樹＊, 小野亮＊, 相澤洸＊＊，石島達夫＊＊＊〇Itsuki INOUE＊, Ryo ONO＊, Takeshi AIZAWA＊＊, and Tatsuo ISHIJIMA＊＊＊
東京大学＊, 米倉製作所＊＊，金沢大学＊＊＊＊The university of Tokyo, ＊＊Yonekura MFG,＊＊＊Kanazawa University

Abstract:
The OH density is measured in microwave water vapor plasma developed for ashingprocess in minimal fabrication system. Laser-induced fluorescence is used for themeasurement of OH density. When the microwave (2.45 GHz) is 100 Hz pulsed mode witha duty cycle of 30% and 60 W average power (3 ms repetitive pulse)， the OH density issaturated at approximately 1.5 × 1015 cm-3 at the center of the plasma at t = 1 ms， wheret = 0 ms is the microwave pulse ignition time. The temporal evolution and the spatial
distribution of OH are measured ， and the generation and decay mechanisms of OH
radicals are discussed.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

バリア放電における放電本数計算手法
Calculation method of discharge number in DBD〇竹本翔一＊, 松井良彦＊＊, 飯盛遊＊＊,西島義明＊＊＊,松本修一＊＊＊ ,榎本啓士＊＊＊〇竹本翔一＊, 松井良彦＊＊, 飯盛遊＊＊,西島義明＊＊＊,松本修一＊＊＊ ,榎本啓士＊＊＊〇Shoichi TAKAMOTO＊, Yoshihiko MATSUI＊＊, Yu ISAKARI＊＊, Yoshiaki NISHIJIMA＊＊＊, Shuichi MATSUMOTO＊＊＊, Hiroshi ENOMOTO＊＊＊〇株式会社 SOKEN＊, 株式会社デンソー＊＊,金沢大学＊＊＊＊SOKEN CORP. ＊＊DENSO CORP. ＊＊＊Kanazawa University

Abstract:
There is dielectric barrier discharge (DBD) as a means to generate ozone efficiently.
In order to improve the generation efficiency of ozone, it is necessary to increase the electriccharge amount of single discharge and the number of discharges. In other words, it isnecessary to grasp the relationship between the discharge characteristics and the amountof generated ozone. However, to date, there has been no methods by which measurementof single discharge characteristics and measurement of ozone production can be evaluatedin the same experimental system. In this study, we constructed the method to calculate thenumber of single discharges by repeatedly subtracting the reference current waveform of asingle discharge from the macro discharge current waveform.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

バリア放電の周波数特性を考慮した放電特性数式モデルの開発
The mathematical model of discharge characteristics of DBD
considering applied voltage frequency〇竹本翔一＊, 松井良彦＊＊, 飯盛遊＊＊, 服部健二＊＊, 西島義明＊＊＊, 松本修一＊＊＊, 榎本啓士＊＊＊〇竹本翔一＊, 松井良彦＊＊, 飯盛遊＊＊, 服部健二＊＊, 西島義明＊＊＊, 松本修一＊＊＊, 榎本啓士＊＊＊〇Shoichi TAKAMOTO＊, Yoshihiko MATSUI＊＊, Yu ISAKARI＊＊,Yoshiaki NISHIJIMA＊＊＊, Shuichi MATSUMOTO＊＊＊, Hiroshi ENOMOTO＊＊＊〇株式会社 SOKEN＊, 株式会社デンソー＊＊,金沢大学＊＊＊＊SOKEN CORP. ＊＊DENSO CORP. ＊＊＊Kanazawa University

Abstract:
Dielectric Barrier Discharge (DBD) is expected to be applied in various fields suchas automobiles, surface treatment and medical treatment. In the design of an electricalcircuit using a DBD as a load, it is essential to clarify its discharge characteristics. However,to date, no mathematical model has been available that can handle changes in discharge
characteristics due to applied voltage frequency in an electric circuit. In this study, we foundthat the discharge resistance changes when the applied voltage frequency changes, throughsingle discharge observation and measurement. Furthermore, the phenomenon was
expected to space-time and theorized to construct the mathematical model that can handle
frequency change of discharge resistance value of macro-scale DBD.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

エステル交換反応を用いた低動粘度植物系電気絶縁油の作製
Production of Vegetable Oil based Insulating Oil with Low Kinematic
Viscosityusing Ester Exchange Reaction〇長井宏樹，山田卓哉，石黒泰誠，村上祐一，村本裕二〇長井宏樹，山田卓哉，石黒泰誠，村上祐一，村本裕二
Hiroki NAGAI
名城大学〇Hiroki NAGAI, Takuya YAMADA, Taisei ISHIGURO, Yuichi MURAKAMI, Yuji
MURAMOTO

Abstract:
Our paper reports AC breakdown properties of vegetable oil by ester exchange
reaction. Experimental oil was a soybean oil treated ester exchange reaction. We observed
AC breakdown strength of the ester soybean oil. These results were shown as the following:(i) Kinematic viscosity of the soybean ester oil was lower than that of soybean oil before
ester exchange reaction. (ii) Kinematic viscosity of the soybean ester oil decreases withincrease of NaOH. (iii) AC breakdown strength of the soybean ester was as big as that ofnatural oil.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

高周波バーストパルスががん細胞へ与える影響における低周波重畳の効果
Influence of Superimposing Low Frequency on Effect on Cancer cellof High Frequency Burst Pulse〇佐藤浩美＊, 南谷靖史＊，卜部玄＊＊，亀崎太一＊＊，岡本修治＊＊，勝木淳＊＊〇佐藤浩美＊, 南谷靖史＊，卜部玄＊＊，亀崎太一＊＊，岡本修治＊＊，勝木淳＊＊
Hiromi SATO＊, Yasushi MINAMITANI＊，Gen URABE＊＊, Taichi KAMEZAKI＊＊, Shuji
OKAMOTO＊＊, Sunao KATSUKI＊＊
山形大院＊，熊本大院＊＊Graduate school of Science and Engineering, Yamagata University, ＊＊Graduate
school of Science and Technology, Kumamoto University

Abstract:
The cancer treatment by an ultra-short pulse high electric field is one of new
biological applications. It is shown that cancer is able to be treated by nanosecond pulsed
high electric field. In this study, we have investigated effect on a cancer cell by a highfrequency and high intensity burst pulse for cancer treatment. And, it is more effective to
add a burst pulse that can be continuously supplied, rather than a single pulse and repeatedsupply to cells. However, unipolar burst pulses also contain low frequency components dueto their own burst pulse width. Here, we investigated the influence of low frequency
components contained in unipolar burst pulses on cell death. As a result, cell death could
be caused more effectively by applying a burst pulse in which high frequency and low
frequency were superimposed.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

細胞膜穿孔のためのパルス波形に関する解析的考察
Analytical consideration of pulse waveform for electroporation〇豊満陽希, 主計俊哉, 勝木淳〇豊満陽希, 主計俊哉, 勝木淳〇Haruki Toyomitsu, Shunya KAZUE and Sunao KATSUKI

熊本大学
Kumamoto University

Abstract:
Pulsed electric fields produce pores in the cell membrane, which is called
electroporation. This paper discusses the pore expansion process under a high electric fieldon the basis of the electrical energy dissipation in the pore. The waveform of the external
electric field determines the history of the energy dissipation into the pore, and thencontributes to the determination of the size and the number density of the pore.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

電気パルスによる金属細線爆発を用いた廃太陽光パネルからの選択的金属回収の検討
Examination of selective metal recovery from PV panel using wire
explosion by electrical disintegration〇澤村幸宏＊, 西麻依子＊, 丸山修平＊, 近藤正隆＊, 林秀原＊, 浪平隆男＊＊, 所千晴＊
〇澤村幸宏＊, 西麻依子＊, 丸山修平＊, 近藤正隆＊, 林秀原＊, 浪平隆男＊＊, 所千晴＊
〇Yukihiro SAWAMURA*, Maiko NISHI*, Shuhei MARUYAMA*, Masataka KONDO*,
Soowon LIM*, Takao NAMIHIRA**, Chiharu TOKORO*
早稲田大学＊, 熊本大学＊＊* Faculty of Science and Engineering, Waseda University** Institute of Pulsed Power Science, Kumamoto University

Abstract:
Photovoltaic (PV) panels are widely used recently and has been exponentially
increasing. However, the recycling system of PV panels has not been established. In thispaper, we introduce a novel electrical disintegration (ED) method to separate copper in the
PV panels. Samples were prepared by removing the glass with the hot knife method fromthe PV panels before applying the ED method. The pulsed power source was connected toa thin Cu wire of the sample. A large current flowed through the wire then it caused a wire
explosion. Precipitates were collected by wet sieving method and followed by elemental
analysis. Experimental results indicate that the Cu wire was successfully separated from thePV panels with high selectivity and enough for Cu recycling.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

強電界パルスが多量体タンパク質に及ぼす影響
Influence of intense electrical pulses on multimer protein○中村剛丸，卜部玄，大石諒，勝木淳○中村剛丸，卜部玄，大石諒，勝木淳〇Gomaru NAKAMURA，Gen URABE，Ryo OISHI，Sunao KATSUKI
熊本大学
Kumamoto University

Abstract:
This paper discusses the influence of intense nanosecond pulsed electric field(nsPEF) up to 300 kV/cm on the structure of urease proteins (hexamer). Quaternary
structure of urease was investigated by means of the modified SDS-PAGE. Our experimentindicates the intense electric fields more than 200 kV/cm directly influence the quaternary
structure of some kinds of multimer proteins including urease.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

気中水滴噴霧水処理においてパルスストリーマ放電で生成された活性種の反応観測Reaction observation of Active Species Generated by Pulsed
Streamer Discharge in the Air with Droplets for Water Treatment
齋藤崇＊, 〇南谷靖史＊齋藤崇＊, 〇南谷靖史＊
Takashi SAITO*, 〇Yasushi MINAMITANI*
山形大院＊＊Graduate school of Science and Engineering, Yamagata University

Abstract:
The image of hydroxyl radical reacting with the droplets in the area of pulsed
streamer discharge has been observed. Luminol luminescence was used for detectinghydroxyl radical. The luminol luminescence was taken by using a high speed camera with
an image intensifier. The discharge was generated at single shot in order to reduce the effectof the ozone generated by the discharge. We took a photograph that hydroxyl radical wasjust reacting to the luminol on the droplets.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

ハイパボリック電荷緩和則の適用条件
Proper conditions for the hyperbolic law of charge relaxation
大澤敦大澤敦A. Ohsawa
労働安全衛生総合研究所
National Institute of Occupational Safety and Health, Japan

Abstract:
This paper discusses the hyperbolic law of the charge relaxation for low-conductivity
liquids, which was proposed by Bustin et al. [Hydrocarbon Processing 43 (1964) 209–216]
to describe the charge relaxation experimentally observed in low-conductivity liquids (≤ 1
pS/m), in which it is faster than that predicted with the exponential (ohmic) charge relaxation.
In some literature, [R.J. Pazda et al. J. Electrostat. 28 (1992) 175–185] and [M. Fujii,
Handbook of electrostatics, Ed. IEJ, Ohm-sha, Tokyo (1998) 1063–1064 in Japanese],
however, the hyperbolic law was invalidly applied, resulting in the charge relaxation
appearing slower than that with the exponential law. Therefore, we obtain conditions
properly satisfying the requirement that the hyperbolic charge relaxation be faster than the
exponential one for identification of electrostatic hazards in low-conductivity liquids.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

パルス放電によるアニサキスの殺虫
Killing of Anisakis Larva Caused by Pulsed Discharge Treatment
井上 陽一＊, 〇鬼塚 千波里＊, 中村 謙吾＊, 王 斗艶＊＊, 浪平 隆男＊＊井上 陽一＊,〇鬼塚 千波里＊, 中村 謙吾＊, 王 斗艶＊＊, 浪平 隆男＊＊
Yoichi INOUE＊,〇Chinari ONITSUKA＊,Kengo NAKAMURA＊,
Douyan WANG＊＊,Takao NAMIHIRA＊＊

株式会社ジャパンシーフーズ＊, 熊本大学パルスパワー科学研究所＊＊＊Japan Seafoods Co.,Ltd.
＊＊Institute of Pulsed Power Science, Kumamoto University

Abstract:2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

超高感度紫外線カメラによる静電気放電現象の観察～剥離帯電による放電現象の剥離速度依存性～
Observation of electrostatic discharge phenomenon
by ultra high sensitivity ultra violet camera
Peeling speed dependency of discharge phenomenon by peelingcharge〇大津孝佳*,永尾優磨*,ﾊﾞｯﾄﾄﾙｶﾞﾀﾞﾜｰﾌｰ*,平沢朋幹*,佐藤龍之介*,長谷川孝美**,大沢隆二***〇大津孝佳*,永尾優磨*,ﾊﾞｯﾄﾄﾙｶﾞﾀﾞﾜｰﾌｰ*,平沢朋幹*,佐藤龍之介*,長谷川孝美**,大沢隆二***
Takayoshi OHTSU*,
Yuma,NAGAO*,Battulga Davaakhuu*,
Tomoki HIRASAWA*,Ryunosuke SATO*,
Takami HASEGAWA**,Yuji OHSAWA***
沼津工業高等専門学校*,(株)ブルービジョン**,(株)精工技研*National Institute of Technology, Numazu College, **Bluevision Ltd.,Japan, *** Seiko
Giken Co.,Ltd

Abstract:
Observation of low energy discharge phenomena is important in identifying thecause and confirming the effect of the countermeasure technology as the electrostatic
resistance of the electronic equipment decreases. As the low energy discharge, thedischarge phenomenon due to peeling charge occurs in various processes such as thetransfer of adhesive tape, protective film, and glass substrate for liquid crystal panel, so
detailed elucidation of not only the charge phenomenon but the discharge phenomenon isdesired. In this study, we observed the electrostatic discharge phenomenon using an ultrahigh sensitivity ultraviolet camera and an optical electric field sensor. In particular, it reports
about the peeling speed dependence of the micro gap discharge by the peeling charge ofan adhesive tape.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

ナノ秒パルスプラズマと抗 PD-1 抗体の併用による抗腫瘍効果の検証
Antitumor Effects Induced by Nanosecond Pulsed Streamer
Discharge in Combination with Anti-PD-1 Antibody〇近藤陽介＊, 武田早代＊, 柳井秀元＊＊, 小野亮＊〇近藤陽介＊, 武田早代＊, 柳井秀元＊＊, 小野亮＊〇Yosuke KONDO＊, Sayo TAKEDA＊, Hideyuki YANAI＊＊, Ryo ONO＊
東大新領域＊, 東大先端研＊＊＊Department of Advanced Energy, The University of Tokyo, ＊＊Research Center for
Advanced Science and Technology, The University of Tokyo

Abstract:
Recently, cold atmospheric pressure plasma has been expected to be applied tocancer therapy. We have examined anti-tumor effects induced by pulsed streamer discharge
against the tumors implanted in mice. In the present study, we investigated anti-tumor effectagainst B16F10 and Colon-26 tumor by using plasma in combination with checkpoint
inhibitor, anti-PD-1 antibody, to get synergistic treatment effect. As a result, B16F10 tumor
did not show any anti-tumor effect in all conditions. On the other hand, Colon-26 tumor
showed clear suppression of its growth by the combination therapy, which suggested thepossibility of new treatment method of plasma and checkpoint inhibitor.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

小型ナノ秒パルス電源の高出力化および高効率化
Higher output and Higher efficiency of a compact nanosecond pulse
generator○松川竜己＊, 上治智裕＊, 松田樹也＊＊, 王斗艶＊＊＊, 浪平隆男＊＊＊○松川竜己＊, 上治智裕＊, 松田樹也＊＊, 王斗艶＊＊＊, 浪平隆男＊＊＊◯Ryuki MATSUKAWA＊, Tomohiro UEJI＊, Mikiya MATSUDA＊＊, Douyan WANG＊＊＊, Takao NAMIHIRA＊＊＊熊本大学大学院自然科学教育部＊, 熊本大学工学部＊＊, 熊本大学パルスパワー科学研究所＊＊＊＊Graduate School of Science and Technology, Kumamoto University, ＊＊Faculty ofEngineering, Kumamoto University, ＊＊＊Institute of Pulsed Power Science, Kumamoto
University

Abstract:
Pulses with extremely short FWHM allow for higher energy efficiency in plasma
processing. The conventional nanosecond pulse generator developed by our researchgroup can generate high voltage with rise time and fall time of 2ns each, and FWHM is 5ns.
The nanosecond pulse generator (NS-PG) consists a microsecond pulse generator (MSPG) and a nanosecond pulse forming line (NS-PFL). The MS-PG generates a 60 kV peakpulse, and the pulse is compressed to 5 ns by NS-PFL. The volume of NS-PG was 91 L,
and miniaturization was necessary. So, we made a compact NS-PG. The volume was
reduced to 12.1 liters. However, the output voltage and voltage efficiency of this new
generator is very low. Therefore, three experiments were conducted to improve the output
voltage and voltage efficiency. The three experiments were conducted focusing on the NSPFL. The NS-PFL uses Blumlein line which consists coaxial cables and spark gap switch.
The experiment contents are changing configuration of spark gap switch, applying ferrite
cores to coaxial cables and changing filling gas in the gap switch. With three experiments,
output voltage increases from 8.4 kV to 48.2 kV, and voltage efficiency increases from 42.8%
to 83.1%.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

Measurement of temporal variation of OH density in wet nitrogenoxygen pulsed streamer discharge with different amounts of oxygen
Measurement of temporal variation of OH density in wet nitrogenoxygen pulsed streamer discharge with different amounts of oxygen〇Zhang Xiang*，小室淳史**, 小野亮*〇Zhang Xiang*，小室淳史**, 小野亮*
〇Zhang Xiang*, Atsushi Komuro**, Ryo Ono*
東京大学* 東北大学**
The University of Tokyo*, Tohoku University**

Abstract:
The temporal variation of OH density in wet N2-O2 pulsed positive streamer
discharge with different amounts of O2 is measured using laser-induced fluorescence. The
result under trace amounts of O2 (< 20 ppm) show slow decays of OH density after
discharge pulse. The decay time constant is 2.5 ms when O2 = 0 ppm. When O2 =1-40%,
the recombination reaction of OH can explain the decay of OH density for t > 40 μs, wheret is the postdischarge time, but not sufficient for 0 μs < t < 40 μs. Postdischarge simulations
are used in both cases aiming at explaining the measured OH decay.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019自己放電式プラズマによる真空除電
Static Elimination in Vacuum by Using Self-Discharged Plasma○池畑隆*，包睿達*，最上智史**，峯村和樹**，野村信雄**○池畑隆*，包睿達*，最上智史**，峯村和樹**，野村信雄**〇Takashi IKEHATA*, Bao RUIDA*, Tomofumi MOGAMI**, Kazuki MINEMURA**
and Nobuo NOMURA**
茨城大理工*，春日電機***Graduate School of Science and Engineering, Ibaraki University**Kasuga Denki Inc.

Abstract:
Demand for static elimination in vacuum is expanding especially in display panels
and functional films fabrication industries. One of on-site technologies is to trigger a selfdischarge on the charged work surface by introducing a gas. However, academic researchon the subject including discussion on the detailed characteristics and the physicalmechanism is little reported. Therefore, the authors have conducted a model experimenton the static elimination by the self-discharged plasma. It is found that the potential of a few
hundred volts remains on the work regardless of the initial charge polarity.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

高電界パルス殺菌におけるパルス波形に関する考察
Experimental and analytical considerations of waveform in pulsed
electric field sterilization
宮﨑 大貴宮﨑 大貴
Daiki Miyazaki
熊本大学 勝木研究室
Kumamoto University

Abstract:
Pulsed electric field (PEF) is one of the non-thermal physical bactericidal agents thatis unlikely to denature ingredients in liquid food. This paper discusses the optimum pulse
waveform for the PEF sterilization experimentally and analytically. Enterobacter aerogenes
in carboxymethyl cellulose solution (107 /ml) was continuously subjected to the PEF(Electric field : 30-50 kV/cm, pulse duration : 100-600 ns) and subsequently to the mild
thermal energy with the temperature of 55℃. The minimum pulse durations for 6-log orderbacterial reduction for the field strengths of 30 and 50 kV/cm were 300 and 600 ns,
respectively. The longer PEF with the moderate field strength tends to be more efficient thanthe more intense field with the shorter pulse duration. An electromagnetic energy into amembrane pore due to the external electric field was calculated to discuss the pore
expansion process based on the thermal energy. The waveform of the field determines thehistory of the energy dissipation into the pore, and then contributes to the determination of
the diameter and the number density of the pore. The longer pulse enlarges the membranepore, whereas the faster buildup field is likely to increase the number of pores.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

粉体連続投入におけるサイロ内の突起物からの静電気放電
Electrostatic Discharges from Metal Protrusion inside Silo during
Powder loading
崔光石*、〇長田裕生**、鈴木輝夫**崔光石*、〇長田裕生**、鈴木輝夫**
Kwangseok CHOI*,〇Yuki OSADA* Teruo SUZUKI***労働安全衛生総合研究所、**春日電機株式会社*National Institute of Occupational Safety and Health, Japan**Kasuga Denki Co., Ltd.

Abstract:
The electrostatic discharges that occurred from metal protrusion (D; 4 cm) inside asilo was investigated during the continuous loading of polypropylene powders (about 800
kg). The graphs of the experimental results can be divided into two main areas: area A
representing when the powder approaches the protrusion, and area B when the powder
levels completely overtook the protrusions. In area A, the amount of electrostatic discharges
first gradually increased up to a maximum of -110 nC, then decreased. In area B, a part of
the tested discharges amount surpassed the measurement range and therefore a specificnumerical result could not be obtained. However, it could be seen that the obtained values
were several times as large as the values in area A.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

印加電圧の極性が液面放電の進展とヒドロキシラジカルの生成に及ぼす影響
Influence of Voltage Polarity and on Development of Pulsed
Discharge Over Water Surface and Hydroxyl Radical Production〇高橋克幸＊，＊＊，高山大聖＊，武田尚大＊，辛嶋一樹＊＊＊，高木浩一＊，＊＊，浪平隆
男＊＊＊＊〇高橋克幸＊，＊＊，高山大聖＊，武田尚大＊，辛嶋一樹＊＊＊，高木浩一＊，＊＊，浪平隆男＊＊＊＊〇Katsuyuki TAKAHASHI *, **，Hirotoshi TAKAYAMA *，Masahiro TAKEDA *，Kazuki KARASHIMA ***, Koichi TAKAKI *, **, and Takao NAMIHIRA ****
岩手大学理工学部＊,岩手大学次世代アグリイノベーションセンター＊＊，熊本大学大学院自然科学研究科＊＊＊，熊本大学パルスパワー科学研究所＊＊＊＊*Faculty of Science and Engineering, Iwate University, **Agri-Innovation Center, Iwate
University*** Graduate School of Science and Technology, Kumamoto University,**** Institute of Pulsed Power Science, Kumamoto University

Abstract:
The influence of the voltage polarity on the development of pulsed discharge over
the water surface and the hydroxyl radical production is investigated. A tungsten wire isplaced above the water and is used as high voltage electrode. A grounded stainless-steel
disk is sunk to the bottom of the water. The positive and negative pulsed high voltages are
generated using a capacitive energy storage pulsed power generator driven by a MOS-FET.
An ICCD camera is used for observation of the development of discharges. An indigo
carmine solution is used as a chemical probe of hydroxyl radical. The maximum discharge
length, the propagation speed of discharges and the emission intensity at wavelength of 308
nm in the case of negative polarity are higher than them of positive polarity. The amount ofhydroxyl radical dissolved into the solution in the case of positive polarity is higher than thatof negative polarity. The results show that positive ions produced in the positive discharges
could contribute to hydroxyl radical production in the solution by the sputtering effect.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

高電界パルスを用いた酵母内成分の抽出特性
Extraction characteristics of yeast ingredients using Pulsed Electric
Fields〇岡本修治，亀崎太一，村上鷹児，中尾圭佑，勝木淳〇岡本修治，亀崎太一，村上鷹児，中尾
圭佑，勝木淳〇Shuji OKAMOTO, Taichi KAMEZAKI, Yoji MURAKAMI, Keisuke NAKAO, Sunao
KATSUKI
熊本大学
Kumamoto University

Abstract:
This paper describes the extraction of intracellular contents of yeast(Saccharomyces cerevisiae) using 600 ns-long, 20 kV/cm pulsed electric fields (PEFs).
Amounts of nucleic acids and amino acids included in supernatant from the yeast
suspension were evaluated and compared to those by the conventional thermal method.
Molecular size in the extract was investigated using SDS-PAGE. Also, the membrane
damage and the cell wall morphology was observed using a fluorescent microscope.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

プラズマジェットによるカーボンクロスの親水処理がピロロキノリンキノンの吸着および酸化還元挙動に及ぼす影響
Effect of Hydrophilic Treatment of Carbon Cloth by Plasma Jet on
the Adsorption and Redox Behavior of Pyrroloquinoline Quinone〇須田健太＊, 松井雅義＊, 谷野孝徳＊,＊＊, 大嶋孝之＊,＊＊〇須田健太＊, 松井雅義＊,
谷野孝徳＊,＊＊, 大嶋孝之＊,＊＊〇Kenta SUDA*, Masayoshi MATSUI*, Takanori TANINO*,** and Takayuki OHSHIMA*,**
群馬大学大学院理工学府＊, 群馬大学食健康科学教育研究センター＊＊*Division of Environmental Engineering Science, Gunma University, **Gunma University
Center for Food Science and Wellness (GUCFW)

Abstract:
Enhancement of redox activity of pyrroloquinoline quinone (PQQ) on the electrodeis very important to develop significant applications such as biofuel cell and biosensor. In
this study, we evaluated the effect of plasma jet treatment of carbon cloth (CC) on theadsorption and redox activity of PQQ. CC was successfully hydrophilized by Ar, Ar + CO2
and Ar + N2 plasma jet. Adsorption amount of PQQ was increased on the moderatelyhydrophilized CC surface. The excess hydrophilic properties seemed to inhibit theadsorption of PQQ on CC. Cyclic voltammograms (CVs) of PQQ on hydrophilized CC
electrodes showed well-defined redox peaks. Thus, increasing the amount of PQQ
adsorption on CC is effective for the enhancement of redox activity. However the peakseparation (∆Ep) of CVs was increased provably due to decrease in electrical conductivityof CC.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

Characteristic study of pulsed surface dielectric barrier discharge inatmospheric air
Characteristic study of pulsed surface dielectric barrier discharge inatmospheric air
OBangfa PENG*, Nan JIANG*, Douyan WANG**, Takao Namihira**, Jie LI*, Yan
WU*OBangfa PENG*, Nan JIANG*, Douyan WANG**, Takao Namihira**, Jie LI*, Yan WU*
Bangfa PENG
大連理工大学
School of Electrical Engineering, Dalian University of Technology, Dalian, China

Abstract:
Streamer generation and propagation of positive pulsed surface dielectric barrierdischarge (SDBD) has been investigated through the experiment. The results show that thesingle pulsed discharge consists of primary streamer and secondary streamer. Primary
streamer is positive streamer characterized with streamer-like morphology and appears in
the leading front of pulsed voltage. However, the secondary streamer is negative discharge,
which has a relative diffuse morphology and emerges in the decaying region of pulsed
voltage.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

Enrofloxacin Degradation in Water by Pulsed Discharge Plasma
Combined With Graphene-WO3 Nanocomposites
Enrofloxacin Degradation in Water by Pulsed Discharge Plasma
Combined With Graphene-WO3 Nanocomposites
OHe GUO**, Nan JIANG*,, Douyan WANG***, Takao Namihira**, Jie LI*, Yan WU*OHe
GUO**, Nan JIANG*,, Douyan WANG***, Takao Namihira**, Jie LI*, Yan WU*
He GUO大連理工大学
School of Electrical Engineering, Dalian University of Technology, Dalian, China

Abstract:
Herein, pulsed discharge plasma (PDP) was combined with graphene-WO3
nanocomposites for enhancing enrofloxacin (EFA) degradation. The results showed thatgraphene could be hybridized with WO3 nanoparticles successfully. Addition of WO3
enhanced EFA removal efficiency in PDP system, which raised from 76.0% to 85.4% with60 min treatment time. Compared to the pure WO3, rGO/WO3 could further improve the
EFA removal efficiency in PDP system, which can reach 99.1 % with 60 min treatment.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

Study on Ion Flow Field of Corona Discharge in Bipolar HVDC
Transmission Lines
Study on Ion Flow Field of Corona Discharge in Bipolar HVDC
Transmission Lines
OShiqiang LIU*, Shouzheng LI*, Yuze JIANG**, Nan JIANG*, Jie LI*, Yan WU*OShiqiang
LIU*, Shouzheng LI*, Yuze JIANG**, Nan JIANG*, Jie LI*, Yan WU*
Shiqiang LIU
大連理工大学
School of Electrical Engineering, Dalian University of Technology, Dalian, China

Abstract:
The ground ion flow field generated by corona discharge in HVDC transmission lines
can reflect the operation status of the lines. In this paper, a reduced scale wire-plateexperimental device that the Wilson plate is flush with the grounding plate was designed to
study the ground composite field strength and ion current density distribution of bipolar
HVDC transmission lines under different voltages. The results show that the groundcomposite field strength and ion current density are asymmetrically distributed with respect
to the center of positive and negative conductors; With the increase of applied voltage, theground composite field strength and ion current density will move to the direction of positive
conductor; The ground ion current density at the center of the positive and negative
conductors changes from positive to negative with the increase of voltage.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

直流電界および凍結を用いた氷中の大腸菌殺菌
Sterilization of Escherichia coli in Ice Using DC Electric Field andFreezing○松井秀喜, 村上祐一, 村本裕二○松井秀喜, 村上祐一, 村本裕二
Hideki MATSUI
名城大学
Meijo University

Abstract:
This paper reports the effect of electric field (DC 100 V/mm) application and freezing(-20 ℃ or -80 ℃) on sterilization of Escherichia coli in ice. The sample was E. coli (JM103)
in 5×10-3 mol/L NaCl aqueous solution. The experimental sample 120 μL placed in a cuvettewith parallel electrode plates (the distance between the electrodes was 1 mm), cooled at 20 ℃ or -80 ℃ for 20 min. After freezing, DC voltage 100 V was applied to the sample at-20 ℃ or -80 ℃. These results were shown as the following: (i) The survival ratio of E. coli
with no treatment was higher than that after any treatments. (ii) At -20 °C freezing, thesurvival ratio of E. coli after freezing only was higher than that after freezing and electric field
application. However, (iii) At -80 °C freezing, the survival ratios of E. coli after freezing only
and after freezing and electric field application were almost the same.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

導電性の異なるゴムからの放電エネルギーの比較
Comparison of Discharge Energy from Rubbers with Different
Conductivity
田村裕之田村裕之
Hiroyuki TAMURA
消防研究センター
National Research Institute of Fire and Disaster, Japan

Abstract:
In the comparison with the rubber of the resistivity more than the resistivity of theantistatic, the discharge current from the charged rubber packing with different resistivity
was observed.
・Discharge current is larger when resistivity is smaller.
・The length of discharge time is not much affected by the resistivity.
・Discharge energy depends on the magnitude of discharge current.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

パラレル電極型ストリーマ放電における準安定準位 N2(A3∑u+ )の LIF
計測
Measurement of N2(A3∑u+ ) Metastable in Parallel type Streamer
Discharge by Laser-Induced Fluorescence○西本将基＊, 立花幸介＊，古木貴志＊, 市來龍大＊, 金澤誠司＊鈴木あすみ＊＊, 黒井聖
史＊＊, 鈴村啓＊＊, 田中利夫＊＊,茂木寛治＊＊, Marek Kocik＊＊＊, Jerzy Mizeraczyk＊＊＊＊○西本将基＊, 立花幸介＊，古木貴志＊, 市來龍大＊, 金澤誠司＊鈴木あすみ＊＊,
黒井聖史＊＊, 鈴村啓＊＊, 田中利夫＊＊,茂木寛治＊＊, Marek Kocik＊＊＊, Jerzy
Mizeraczyk＊＊＊＊○Masaki NISHIMTO＊, Kosuke TACHIBANA＊, Takashi FURUKI＊, Ryuta ICHIKI＊,
Seiji KANAZAWA＊, Asumi SUZUKI＊＊, Kiyoshi KUROI＊＊, Kei SUZUMURA＊＊,Toshio TANAKA＊＊, Kanji MOTEGI＊＊, Marek KOCIK＊＊＊, Jerzy MIZERACZYK＊＊＊＊〇大分大学理工＊，ダイキン工業＊＊，ポーランド科学アカデミー＊＊＊,
グディニァ海事大学＊＊＊＊＊Faculty of Science and Technology, Oita University, ＊＊Daikin Industries, Ltd.,＊＊＊Polish Academy of Sciences, ＊＊＊＊Gdynia Maritime University

Abstract:
Reactive species generated by streamer discharge are very effective for air
purification. N2(A3∑u+) metastable, which is one of reactive species generated by streamer
discharge, has been studied by researchers. However, to the best of our knowledge, there
have been no studies on measurement of N2(A3∑u+) using parallel electrodes. In this study,a laser-induced fluorescence (LIF) technique was applied to measure the N2(A3∑u+). As aresult, we observed discharge structure and the spatial distribution of N2 metastable stateN2(A3∑u+) at sub-atmospheric pressures in parallel type streamer discharge. Stronger
discharges occurred from swaged portion of parallel electrode, but it was found thatN2(A3∑u+) was distributed widely at both ends of the parallel electrode.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

大気圧マイクロプラズマ照射における角質層内薬剤浸透性の評価
Estimation of effect on transdermal absorption of drug byatmospheric microplasma irradiation in stratum corneum〇青島 知道＊, クリストフヤロスラブ＊＊, マリウスブラジャン＊＊＊, 清水 一男＊,＊＊,＊＊＊〇青島 知道＊, クリストフヤロスラブ＊＊, マリウスブラジャン＊＊＊, 清水 一男＊,＊＊,＊＊＊〇Tomomichi AOSHIMA＊, Jaroslav KRISTOF＊＊, Marius Gabriel BLAJAN＊＊＊, Kazuo
SHIMIZU＊, ＊＊, ＊＊＊静岡大学大学院 総合科学技術研究科＊ ,静岡大学創造科学技術大学院＊＊,静岡大学イノ
ベーション社会連携推進機構＊＊＊*Graduate School of Engineering, Shizuoka University, **Graduate School of Scienceand Technology, Shizuoka University, ***Organization for Innovation and Social
Collaboration, Shizuoka University

Abstract:
The process of transdermal drug delivery of Adenosine (Molecular Weight=267.2
Da, Hydrophilic) by Microplasma Drug Delivery (MDD) method was investigated. Yucatan
Micropig Skin was as target for drug delivery process. The absorbed quantity of drug in theskin was measured after the permeability of skin was modified by using tape stripping test
and microplasma treatment. High-Performance Liquid Chromatography (HPLC) was used
to measure absorbed quantity of target drug (Adenosine) in stratum corneum (SC) layer.
Transdermal absorption of Adenosine was improved with atmospheric microplasma
irradiation. This result shows that MDD method could have potential for the transdermal
drug delivery.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

水処理用パルス放電プラズマリアクタによる酸素ガス雰囲気中のエネル
ギー効率向上への検討
Improvement of Energy Efficiency of Pulse Discharge Plasma
Reactor○林田智仁,

古木貴志, 立花孝介, 市來龍大, 金澤誠司○林田智仁, 古木貴志, 立花孝介,
市來龍大, 金澤誠司
○Tomohito HAYASHIDA, Takashi FURUKI,
Kosuke TACHIBANA, Ryuta ICHIKI, Seiji KANAZAWA
大分大学
Oita University

Abstract:
Persistent orgnic compounds in water are difficult to be decomposed withconventional water treatment , but we can degrade them by using a plasma. In the previous
study, we found that using the Coandă effect improved an energy efficiency of the water
treatment using plasma. In this study, in addition to the Coandă effect, we introduced oxygen
instead of air to a plasma reactor for increasing the energy efficiency. A indigo carmine
solution with a concentration of 10 mg/L and a volume of 300 mL was decolorized by anoxygen plasma driven by a pulsed high voltage (15 kV, 100 pps) and a decolorization rateof the solution was measured. As a result, the decolorization rate and energy efficiency were
better than that in air. The energy efficiency of 187.5 g/kWh was obtained.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

直流アルゴンプラズマにより生成された短寿命活性種の気液界面における反応領域
Reaction region of short-lived active species generated by DC
argon plasma at gas–liquid interface○立花孝介＊，古木貴志＊，市來龍大＊，金澤誠司＊，内田諭＊＊○立花孝介＊，古木貴志＊，市來龍大＊，金澤誠司＊，内田諭＊＊○Kosuke TACHIBANA*, Takashi FURUKI*, Ryuta ICHIKI*, Seiji KANAZAWA*, Satoshi
UCHIDA**＊大分大理工＊＊首都大院システムデザイン*Faculty of Science and Technology, Oita University**Graduate School of Systems Design, Tokyo Metropolitan University

Abstract:
Plasma–liquid interactions are very important to understand mechanisms of plasma
applications but have not been fully understood. To deepen understanding of the interactions,
we have focused on where short-lived active species generated by plasma react with solutes
at a plasma–liquid interface. We adopted sodium chloride (Cl−), bromide (Br−), and iodide(I−) ions as indicators of the reaction region of the short-lived active species. This is because
it is known that these halide ions are located closer to the gas–liquid interface in an order ofI−, Br−, and Cl−. We irradiated a DC argon plasma to 2.1 mol/L sodium chloride, bromide,
and iodide solutions, and concentrations of chlorine, bromine and iodine were measured.
Experimental results indicate a possibility that the short-lived active species generated byplasma could react with the solutes only at the topmost layer of the water surface.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

静電噴霧現象を用いた生理食塩水の微粒化
Atomization of physiological saline by Electrostatic spray
phenomenon〇江頭雅之, 矢澤翔大, 工藤祐輔, 中西哲也〇江頭雅之, 矢澤翔大, 工藤祐輔, 中西哲也
〇Masayuki EGSHIRA, Shota YAZAWA, Yusuke KUDO and Tetsuya NAKANISHI
日大生産工
College of Industrial Technology, Nihon Universty

Abstract:
Recently, asthmatic patients are increased.
Nebulizer therapy is common
treatment for asthmatic patients. Asthmatic patients inhale drug that is atomized bynebulizer. But, efficacy of drug is different each way of inhalation. It is thought that, drug
was not reached to bronchial tube. There is a possibility that the charged particles arereach at a lung. The purpose of this study, proposal of novel drug delivery system forasthmatic patients that applied electrostatic spray phenomenon.
In this paper,
physiological saline was atomized by electrostatic spray phenomenon.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

DBD プラズマアクチュエータにおけるバースト比が気流中のガス密度場
へ与える影響Effests of the burst ratio in the DBD plasma actuatoron the gas density in the flow field〇鈴木健人，小室淳史，高島圭介，野々村拓，金子俊郎，浅井圭介，安藤晃〇鈴木健人，小室
淳史，高島圭介，野々村拓，金子俊郎，浅井圭介，安藤晃〇Kento SUZUKI, Atsushi KOMURO, Keisuke TAKASHIMA, Taku NONOMURA, Toshiro
KANEKO, Keisuke ASAI and Akira ANDO
東北大学院工Graduate School of Engineering, Tohoku University

Abstract:
Effects of burst ratio of an applied high voltage on the density field in the flow were
investigated in a dielectric-barrier-discharge plasma actuator (DBDPA). The experiment was
conducted using a NACA 0015 airfoil model and a hand-made AC power supply for the
DBDPA. The results show that the flow-control becomes less effective and vortices
generated by the DBDPA become smaller as the burst ratio increases. This relation between
the burst ratio and the vortices formation would affect the flow-control effect in the DBDPA.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

グリッド電極を用いたコロナ放電式除電装置における交流電界制御
Control of Electric Field Radiation from Corona Discharge TypeElectrostatic Eliminator using Grounded Grid Electrodes〇山口晋一＊, ＊＊，久保勝也＊，高橋克幸＊，高木浩一＊，永田秀海＊＊〇山口晋一＊,＊＊，久保勝也＊，高橋克幸＊，高木浩一＊，永田秀海＊＊〇Shinichi YAMAGUCHI*，**，Katsuyuki TAKAHASHI*，Koichi TAKAKI* Katsuya KUBO *and Hidemi NAGATA**
岩手大学理工＊，岩手大学次世代アグリイノベーションセンター
シシド静電気＊＊*Faculty of Science and Engineering, Iwate University, ** SHISHIDO ELECTROSTATIC,Ltd.

Abstract:
The corona discharge ionizer has been widely used to eliminate electrostatic charge
on insulators in variety of manufacturing industries for the prevention of electrostatic
discharge (ESD) problems. High speed electrostatic elimination is conventionally requiredfor performance of ionizer. Since high sensitivity of recent electronic electrostatic eliminator.
The most sensitive device such as magnetic head slider used in hard disc drives restricts
the offset voltage to maximum several ~ 10 V in the manufacturing process. On the other
hand, offset voltage is not only ion balance average voltage, but also peak offset voltage
which including induction charge from electrostatic eliminator using corona discharge.
Therefore, our team is confirmed that grounded conductive grid makes attenuate 1/10 of
induction charge and also when high voltage input frequency will increased, electrostatic
elimination time also will decreased.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

同軸円筒型電極内ナノ秒パルス放電の進展速度分布
Propagation velocity distribution on Nanosecond pulsed discharge
in coaxial electrodes○龍輝優＊, 山口仁志＊, 王斗艶＊＊, 浪平隆男＊＊○龍輝優＊, 山口仁志＊, 王斗艶＊＊,浪平隆男＊＊〇Terumasa RYU＊, Hitoshi YAMAGUCHI＊, Douyan WANG＊＊, Takao NAMIHIRA＊＊○熊本大学大学院自然科学教育部＊, 熊本大学パルスパワー科学研究所＊＊○＊Graduate School of Science and Technology, Kumamoto University, ＊＊Institute ofPulsed Power Science, Kumamoto University

Abstract:
The environmental improvements by non-thermal plasma have been actively
studied for various applications. The observation of discharge plasmas is a beneficial for
better understanding of the plasma physics of this growing field. Recently, nanosecond (ns)pulsed discharge with a short pulse duration of 5 ns achieved higher energy efficiency onozone generation and NO removal. However, the underlying mechanisms of these highefficiencies remain unclear. In the present study, the newly developed high-speed imaging
system combined with four emICCD cameras, which can observe the single ns pulsed
discharge phenomenon at over time using a delay generator built-in each camera. Using
this imaging system, the effects of inner electrode geometry on the propagation process(particularly propagation velocity distribution between electrodes) of ns pulsed discharge incoaxial electrodes were investigated. As the results, it was confirmed that the propagation
velocity of streamer heads was significantly affected by inner electrode geometry and waschanged depending on propagation position, not propagating constant propagation velocity.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

純酸素パルスバリア放電下における酸素原子及びオゾン密度の同時レーザー計測
Simultaneous Measurement of Atomic Oxygen and Ozone by Laser
Spectroscopy under Pure Oxygen Pulsed Barrier Discharge
川北拓弥川北拓弥
Takuya Kawakita, Yusuke Nakagawa, Satoshi Uchida, Fumiyoshi Tochikubo
首都大院 システムデザイン
Department of System Design,
Tokyo Metropolitan University

Abstract:
Pure oxygen discharge is preferable for production of atomic oxygen and ozone,
while there is the difficulty in measuring their local densities. The ozone density is usually
measured by UV absorption, but its resolution is insufficient to measure the local ozone
density in filamentary discharges. The atomic oxygen density can be measured by TALIF,
but the ozone interference, which is the in-situ atomic oxygen production due to the ozone
dissociation by incident UV light, disturbs the measurement. Therefore the compensation ofozone interference is important in atomic oxygen measurement. In this study, we achieved
the separation of ozone interference from discharge-originated atomic oxygen, by focusing
on the laser intensity dependence of TALIF signals on them. By varying the laser intensity
in the TALIF measurement, the atomic oxygen density is separated from the ozone
interference signals. Under short-gapped pulsed barrier discharge, the local ozone density
in observed volume is estimated to be about 1 x 10^17 /cm3. The atomic oxygen density isalso estimated to be 6.5 x 10^16 /cm3 using Xe compensation method, and it is consistent
with the local ozone density. However, the estimated atomic oxygen density in the streamer
filament does not agree with the experimental decay, which indicates either underestimationof the discharge volume or the influence of the reactions at the electrode surface.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

酸素放電中におけるガス加熱機構の詳細モデリング
Detailed modelling of gas heating process occurred in an oxygen
discharge○吉田圭吾＊, 小室淳史＊, 安藤晃＊○吉田圭吾＊, 小室淳史＊, 安藤晃＊
○Keigo YOSHIDA＊, Atsushi KOMURO＊, Akira ANDO＊
東北大学院工Department of Electrical Engineering, Tohoku University

Abstract:
Thermal decomposition is one of the problems for ozone production and its
applications. It is important to estimate the gas temperature variation occurred in oxygen
discharge to optimize the ozone generator. In this study, gas temperature variation isestimated in detail from the reaction model including inelastic collision processes. The
obtained results are compared with traditionally used gas heating model based on the
consumed electrical power. The results indicate that the gas heating process through theinelastic collision process affect the temporal variations of the gas temperature after thedischarge.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

針―水面放電に伴う水中電荷の挙動
Behavior of electric charge in water developed by needle-water
discharge〇佐藤旭*,**, 上原聡司*，清水鉄司***，佐藤岳彦*〇佐藤旭*,**, 上原聡司*，清水鉄司***，佐藤岳彦*〇Akira SATO*,**, Satoshi UEHARA*, Tetsuji Shimizu*** and Takehiko SATO*
東北大学流体科学研究所*，東北大学工学研究科**，産業技術総合研究所*Institute of Fluid Science, Tohoku University,**Graduate School of Engineering, Tohoku
University , ***AIST

Abstract:
We clarified the factors relating to characteristics of a needle-water discharge.
Among a position of an electrode on the water,an electrode under a container which was
filled with a water, and an electrode in water to measure electric potential in water, theelectrode on the water has the biggest influence on the behavior of the electric charge inwater. On the other hand, the electrode in water to measure electric potential has thesmallest influence on the behavior of the electric charge in water. The applied voltage andthe container diameter change the behavior of the electric charge linearly.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

DC 放電と AC 放電を併用したプラズマアクチュエータの作動特性に関する実験的研究
Experimental Study on Working Characteristics of Plasma Actuator
Utilizing Combination of DC and AC Discharges〇畑本明彩未, 中井公美, 中野朝, 西田浩之〇畑本明彩未, 中井公美, 中野朝, 西田浩之
〇Asami HATAMOTO, Kumi NAKAI , Asa NAKANO, and Hiroyuki NISHIDA
東京農工大学Tokyo University of Agriculture and Technology

Abstract:
Tri-electrode plasma actuator (TED-PA) induces jets from both the DC and AC
electrode and it is stronger than that of conventional two-electrode plasma actuator. The jetfrom the DC electrode dominantly contributes to the stronger jet. In this report, we
experimentally investigate the operation characteristics of discharge and jet generation at
the DC electrode of TED-PA by taking discharge photographs and measuring flow velocity
fields. And, those results are compared with those of two-electrode actuator which has only
the AC and DC electrode. As a result, it is found that the DC discharge and jet generation isenhanced by the barrier discharge in TED-PA and the enhancement becomes more effective
when the DC voltage is higher.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

ガソリンエンジン用点火プラグにおける流動により延伸した火花放電路の直径に関する考察
A Study on the Diameter of Elongated Spark Discharge Chanel in
Flow Fieldin the Ignition Plug for Gasoline Engine
傅 建華傅 建華Chien-hua FU
日本大学生産工学研究科
Graduate School of Industrial Technology, Nihon University

Abstract:
From the global CO2 reduction trend, improvement in thermal efficiency is required
for the powertrain of automobiles. A promising direction for gasoline engine is lean burn. In
the lean burn, since the laminar burning velocity is decrease, the turbulent flow is intensified
to shorten the burning time. Stable ignition in the high velocity and turbulent flow is requiredin combination with the advance ignition timing. At this time, since the discharge path at the
spark plug gap is elongated by the flow and it is assumed that the elongation of the discharge
path affects the behavior of the ignition to flame propagation, it is important to understandthe phenomena and to model the effect of such discharge path elongation on the ignition
behavior. From this background, the discharge characteristics at spark plug gap in the flow
were investigated using a small wind tunnel. The deformation of the discharge path in theflow was observed using a high-speed camera, and the current and voltage at the spark
plug were measured. The relationship between them was investigated and compared withprevious works. Especially in this report, the relations between the electric current anddiameter of discharge path length are discussed analytically.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

電極材料の異なるスパーク放電装置を用いて生成したプラズマ栄養水の成分分析
Component Analysis of Plasma Nutrient Water Prepared by Spark
Discharge System with Different Electrode Materials〇川野航平＊，下村友人＊，針谷 達＊，滝川浩史＊，井出健太郎＊，日竎 勉＊，爪光男＊＊〇川野航平＊，下村友人＊，針谷 達＊，滝川浩史＊，井出健太郎＊，日竎 勉＊，爪光男＊＊〇Kohei KAWANO＊，Yuto SHIMOMURA＊, Toru
HARIGAI＊, Hirofumi
TAKIKAWA＊, Kentaro
IDE＊＊, Tsutomu
HIBI＊＊,
MitsuoTSUME＊＊

豊橋技術科学大学＊，シンフォニアテクノロジー＊＊＊Toyohashi University of Technology，＊＊Sinfonia Technology Co., Ltd.

Abstract:
Plasma nutrient water which are prepared by spark discharge is able to improve thegrowth of plants. In a spark discharge system for the preparation of plasma nutrient water,high voltage electrodes are placed over water and a grounded electrode is submerged in
the water. In this study, the components of plasma nutrient water prepared by spark
discharge system with different electrode materials are investigated. High voltage electrodes
were PtRh needle. Cu, SUS, Pt, and PtRh needles were used as a submerged electrode.
The concentration of NO3− in plasma nutrient water was high when Pt and PtRh was usedas the submerged electrode. The plasma nutrient water included metal elements being
originate from the submerged electrode and high voltage electrodes. It was indicated thatthe metal component in the plasma nutrient water originating the submerged electrodes ofPt and PtRh was less compared with Cu and SUS submerged electrodes.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019水上パルス沿面放電の陰極降下電圧と電流密度
Cathode Fall Voltage and Current Density of Surface Discharge on
Water〇古里友宏＊, 坂本拓也＊, 山下敬彦＊〇古里友宏＊, 坂本拓也＊, 山下敬彦＊〇Tomohiro FURUSATO*, Takuya SAKAMOTO* and Takahiko YAMASHITA*
長崎大学工＊*Graduate School of Engineering, Nagasaki University

Abstract:
Elucidation of the interaction between liquid and plasma is an important theme in
the field of plasma science. In this study, the time variation of the current density of thepositive pulsed surface discharge on the water was investigated by taking into account thecathode fall voltage. The electric field in the creepage direction at the edge of discharge wascalculated by a charge simulation method based on the similarity between current andelectrostatic fields. In the field calculation, the contact area between discharge and water
was assumed by a charged disk. The current density drastically decreases with time andconverges to a few A/cm2. The fully converged value of the current density is the equivalent
to the value of the direct current discharge on the water.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

ヒト由来培養細胞への大気圧低温プラズマ照射によって生じるゲノム
DNA 損傷の解析
Analysis of genomic DNA damage in human cultured cells induced
by low temperature plasma irradiation〇春田 夏輝, 瀬戸 貴仁, 栗田 弘史, 高島 和則〇春田 夏輝, 瀬戸 貴仁, 栗田 弘史, 高
島 和則〇Natsuki HARUTA, Takahito SETO, Hirofumi KURITA, and Kazunori TAKASHIMA
豊橋技科大Department of Applied Chemistry and Life Sciences, Toyohashi University of Technology

Abstract:
Chromosomal DNA damage in cold plasma-irradiated human lung cancer cell line
was investigated. We confirmed cold atmospheric plasma produced reactive oxygen andnitrogen species (RONS) in a liquid, and the intracellular RONS level was increased in theplasma-irradiated cells. However, significant decrease in the cell viability was not observed
24 h after the plasma irradiation. Since RONS induce oxidative damage inbiomacromolecules, strand breaks and chemical modification of genomic DNA wasinvestigated by comet assay. As a result, not only DNA strand breaks which have been
already investigated but also production of 7,8 dihydro-8-oxoguanine (8-oxoG) formation
were induced by the plasma irradiation. In addition, expression of human OGG1, the major
DNA glycosylase in human cells for removal of 8-OxoG, was also observed.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

自己放電型除電器具の性能比較方法
A method to compare the performance of induced field emission
type electrostatic eliminator.
平井学平井学
Manabu HIRAI
地方独立行政法人大阪産業技術研究所
Osaka Research Institute of Industrial Science and Technology (ORIST)

Abstract:
Channel brushes which were induced-field-emission-type electrostatic eliminators
were compared by using an apparatus specified in Japanese Industrial Standards. A
grounded specimen was put between the wooden block and electrical potential detector of
the apparatus. The initial electrical potential of nylon cloth was measured after ten frictions
by the cotton cloth for each specimen. The values between +1.2 kV and 5.5 kV wereobtained against the specimens. These values contained between 9.4 % and 43 % smaller
than that of the blank sample.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

空間制御された大気圧空気中正極性ストリーマ放電の 2 次元電子密度分布測定
Two-Dimensional Electron Density Measurement of SpatiallyControlled Positive Streamer Discharge in Atmospheric-PressureAir〇稲田優貴＊, 小野亮＊＊,
小室淳史＊＊＊, 熊田亜紀子＊＊, 日高邦彦＊＊, 前山光明＊〇稲田優貴＊, 小野亮＊＊,
小室淳史＊＊＊, 熊田亜紀子＊＊, 日高邦彦＊＊, 前山光明＊〇Yuki INADA*, Ryo ONO**, Atsushi Komuro***, Akiko KUMADA**, Kunihiko HIDAKA**,
and Mitsuaki MAEYAMA*
埼玉大学＊, 東京大学＊＊, 東北大学＊＊＊* Division of Mathematics, Electronics and Information Sciences, Saitama University**Department of Electrical Engineering and Information Systems, The University of Tokyo***Department of Electrical Engineering, Tohoku University

Abstract:
A Talbot type laser wavefront sensor with a temporal resolution of 2 ns was applied
for single-shot two-dimensional electron density measurement of pulsed positive secondary
streamer discharges generated in a form of a spatially-reproducible single filament. The
electron density in the primary streamer was 1014-15 cm-3, which agreed well with previous
simulation results. On the other hand, the experimentally observed electron density at thesecondary streamer initiation was three times higher than that at the primary streamer arrivalat the cathode, which has not been predicted in the previous simulation studies.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

ダイヤモンド電極を用いた電解処理による下水臭の除去
Removal of a Sewage Odor by Electrolytic Process
Using Boron-doped Diamond Electrode〇水野良典＊, 村上栄造＊〇水野良典＊, 村上栄造＊〇Yoshinori MIZUNO＊, Eizo MURAKAMI＊
株式会社朝日工業社＊＊Asahikogyosha Co., Ltd.

Abstract:
Ozone water could be generated by electrolytic process using Boron-Doped
Diamond (BDD) electrode. In this paper, deodorization of sewage odor gas (Hydrogen
Sulfide; H2S, Methyl Mercaptan; CH3SH) by electrolytic process was investigated. Current
efficiency of ozone generation and ozone energy yield were 2.0 %, and 0.5 g/kWh,respectively. Deodorization effect was experimented by odor gas bubbling to electrolytic cell.
Without electrolysis, odor gas was emitted from absorbing solution due to the Henry’s law.
Sulfur odor gas could be eliminated by dissolved ozone generated by BDD electrolysis.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

エレクトレットフィルム発電デバイス
Application of piezoelectric electrets to energy-harvesting system
宝田 隼＊, 髙谷 航平＊，田中 信悟＊，柳本 光輝＊，中西 陸＊
平本 真輝＊，中辻 貴大＊，金子 侑生＊，名切 卓男＊
井元 健二＊＊，改森 信吾＊＊＊，志方 良彰＊＊＊，〇田實 佳郎＊宝田 隼＊, 髙谷 航平＊，田中 信悟＊，柳本 光輝＊，中西 陸＊
平本 真輝＊，中辻 貴大＊，金子 侑生＊，名切 卓男＊
井元 健二＊＊，改森 信吾＊＊＊，志方 良彰＊＊＊，〇田實 佳郎＊
Jun Takarada*, Kohei Takatani*, Shingo Tanaka*, Hiroki Yanagimoto*, Riku Nakanishi*
Masaki Hiramoto*, Takahiro Nakatsuji*, Yuki Kaneko*, Takuo Nakiri*
Kenji Imoto**, Singo Kaimori***, Yoshiaki Shikata*** and 〇Yoshiro Tajitsu*
関西大学大学院＊, 井元製作所＊＊, 住友電気工業＊＊＊*Kansai University, **Imoto Mech. Eng, ***Sumitomo Electric Industries, Ltd.

Abstract:2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

マイクロ波プラズマ源を用いた真空用除電器の開発Ⅱ
Development of a vacuum neutralizer using a microwave plasma
sourceⅡ〇最上智史＊,峯村和樹＊, 野村信雄＊,細田聡史＊＊,神田大樹＊＊,森下貴都＊＊＊〇最上智史＊,峯村和樹＊, 野村信雄＊,細田聡史＊＊,神田大樹＊＊,森下貴都＊＊＊〇Tomofumi Mogami*,Kazuki Minemura*,Nobuo Nomura*,Satoshi Hosoda**, Daiki Koda**
and Takato Morishita***
春日電機＊, JAXA＊＊, 東京大学＊＊＊*Kasuga Denki INC, **Japan Aerospace Exploration Agency Institute of Space andAstronautical Science , ***The University of Tokyo

Abstract:
The number of production processes in vacuum is increasing. Along with this, thedemand for neutralization in a vacuum is increasing. Therefore, in this study, a neutralizer
using a microwave plasma source which can be used in a vacuum was developed. A vacuum
neutralizer was placed in the upper part of the experimental chamber (vacuum degree
3×10−3Pa),and a film running apparatus was also installed. This apparatus was used toinvestigate the neutralizing ability of a vacuum neutralizer. The charge potential
measurement of the film confirmed that the neutralizing ability of the vacuum neutralizer was
sufficient.

2019 Annual Meeting of The Institute of Electrostatics Japan
Kumamoto University
September 12-13, 2019

大気圧アルゴンプラズマ照射で生成する気相・液相活性種の関連性
Gas- and Liquid-phase Reactive Species Generated by
Atmospheric Pressure Argon Plasma〇瀬戸貴仁*, 栗田弘史*, 長門研吉**, 高島和則*〇瀬戸貴仁*, 栗田弘史*, 長門研吉**, 高
島和則*
Takahito Seto*, Hirofumi Kurita*, Kenkichi Nagato**, and Kazunori Takashima*
豊技大*, 高知高専**
Toyohashi University of Technology*, National Institute of Technology, Kochi Collage**

Abstract:
Reactive oxygen and nitrogen species (RONS) produced by an atmosphericpressure plasma jet in both the gas phase and the liquid phase were measured to investigate
the production characteristics. Both of the measurements have been already carried out;
however, these results were not consistent with each other. The gas phase measurement
was performed with an atmospheric pressure mass spectroscopy equipped with an orifice(0.25 mm diameter). It was considered that the reason was the difference of the target size;
the liquid surface was sealed by a plastic film with a small hall (0.26 mm diameter) As aresult, it was possible to measure RONS in the plasma irradiated liquid under this condition,and this experimental setup improved spatial resolution. Furthermore, the results showed
better correlation with the results obtained by mass spectrometry than that obtained in theprevious study.