NEWSLETTERof the International Consortium“Development of High-Power Terahertz
Science & Technology”№4

October 2016
CONTENT

Editorial (Page 1)
How to contribute to the Newsletter
Research highlights (Page 2)
Fundamental Particle Physics Using Gyrotrons in Table-Top Experiments.
Award (Page 5)
Professor T. Idehara awarded the Kenneth J. Button Prize
Personalia (Page 6)
Academician Andrei Viktorovich Gaponov-Grekhov (on his 90th birthday)
List of selected recent publications and patents (Page 7)
New books (Page 19)
News from the Net (Page 20)

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EDITORIAL: HOW TO CONTRIBUTE TO THE NEWSLETTER
Dear Reader,
We are inviting contributions to the following rubrics:
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Research highlights (annotations) presenting the projects pursued by the members of the Consortium.
Short regular papers.
Proposals for collaborative research work.
News from the participating institutions.
Information about conferences, symposia, workshops, seminars.
Programs and frameworks for an exchange of visits and mobility of researchers. Job opportunities(especially for young researchers, e.g. postdoctoral positions, specializations, internships).
Annotations of books, conference proceedings, software and internet resources. Additions to the list of therecent scientific publications and conference reports at the website of the Consortium (http://fir.ufukui.ac.jp/Website_Consortium/publist.html).
Information and announcements about awards and nominations.
Short presentations of laboratories and research groups belonging to the participating institutions.

Please submit your contributions to the Newsletter as well as requests for information to:Professor Toshitaka Idehara
Supervisor of International Cooperation
and Facilitator of the International
Consortium
FIR UFidehara@fir.u-fukui.ac.jp

Dr. Svilen Sabchevski
Editor of the website and the Newsletter
Institute of Electronics of the Bulgarian
Academy of Sciences (IE-BAS)sabch@ie.bas.bg

RESEARCH HIGHLIGHTS
Fundamental Particle Physics Using Gyrotrons in Table-Top Experiments.
Exhibition (Entrance Event) at MEXT
(Ministry of Education, Culture, Sports, Science and Technology of Japan)
presented by University of Fukui and Tokyo University(1 September – 21 October, 2016)
Presenters:

Coordinator:

Professor Shoji Asai
University of Tokyo, Department of Physics, Graduate School of Science, Faculty of Science
Professor Toshitaka Idehara
University of Fukui, Research Center for Development of Far-Infrared Region
Associate Professor Hiromi Yokoyama
University of Tokyo Graduate School of Science; Deputy chief of the Strategy Planning Office
Usually, people associate the fundamental particle physics with large experimental infrastructures that
include huge machines like linear accelerators, synchrotrons, colliders, storage rings, bulky detectors, etc.
Take for example the Large Hadron Collider (LHC) at CERN (the European Organization for Nuclear
Research). It uses a tunnel with a circumference of 27 km, which is comparable to the length of the
Yamanote Line (railway loop line) in Tokyo. In contrast to such spacious facilities, the researchers fromthe University of Tokyo and the University of Fukui have demonstrated a table-top experimental setup,
which occupies an area of the order of one tatami (a mat used as a flooring material in traditional
Japanese-style rooms) as can be seen on the next photos (Fig. 1).
In this experimental study for the first time in the world the energy levels of positronium (Ps) and thehyperfine splitting (HFS) have been measured by a direct method, which is based on the stimulatedtransition between two of the possible states, namely ortho-positronium (o-Ps) and para-positronium (pPs) as shown schematically in Fig. 2.
The positronium is a metastable bound state of one electron (e-) and a positron (e+) that form an exotic
Hydrogel-like atom,. which can exists in two states, namely a triplet (3S1 ortho-positronium (o-Ps)) and asinglet (1S0 para-positronium (p-Ps)). The energy splitting between o-Ps and p-Ps, i.e. the HFS is about
203.4 GHz. A significant discrepancy of 3.9σ (15 ppm) between the measured HFS values and thetheoretical prediction of the quantum electrodynamics (QED was a strong motivation to develop a novel
method for direct and precise evaluation of the HFS [1]. In contrast to the previous indirect methods (bywhich the HFS is obtained from the measured Zeeman splitting in a static magnetic field) that are prone
to systematic errors, the new approach relies on a stimulated transition from o-Ps to p-Ps induced bymeans of irradiation with strong electromagnetic wave with a frequency of about 203 GHz produced by agyrotron. The experimental setup is shown schematically in Fig. 3. It includes a transmission line thatdelivers and couples the wave beam to a high-finesse Fabry-Pérot (FP) cavity, gas chamber and positronFig. 1 Table-top (“one tatami”) experimental setup (upper photo) and the demonstration by Prof. S. Asaiand Prof. T. Idehara (lower photo)source as well as a system of detectors and electronic control modules. The positronium is formed in thecavity using a 22Na source of positrons and nitrogen mixed by iso-Butane as a stopping target. Under theirradiation by a 203 GHz wave some of the o-Ps (decaying into 3-photons) transit into p-Ps (decaying into
2-photons) and consequently the ratio of 2-photon events increases. This process is monitored by thephoton detectors (LaBr3(Ce) scintilators) that are located around the cavity. In the measurements thefrequency of the gyrotron is varied within ~2 GHz to observe a Bret-Wigner resonance of the transition.
The hyperfine transition has been observed with a significance of 5.4 standard deviations. The transition
1.6
8
probability that has been measured directly for the first time is found to be A  3.1 1.2 10 s-1 , whichis in a good agreement with the theoretical value of 3.37x10-8 s-1 [2]. Recently, the whole Breit–Wigner
resonance of the transition from o-Ps to p-Ps has been measured for the first time using a frequencytunable millimeter-wave system and tuning the gyrotron in a very wide range from 201 GHz to 205 GHz
by changing successively several gyrotron cavities of different radii [3].

Fig. 2 Schematic representation of the energy levels and HFS of positronium

Fig. 3 Experimental setup
References[1] S. Asai, T. Yamazaki, A. Miyazaki, T. Suehara, et al., “Direct Measurement of Positronium Hyper Fine
Structure - A New Horizon of Precision Spectroscopy Using Gyrotrons,” Journal of Infrared, Millimeter
and Terahertz Waves, vol. 3, no. 7 (2012) 766-776.
[2] T. Yamazaki, A. Miyazaki, T. Suehara, T. Namba, et al., “Direct observation of the hyperfine transitionof ground-state positronium,” Phys. Rev. Lett , vol. 108 (2012) 253401 (5 pp.).
[3] A. Miyazaki, T. Yamazaki, T. Suehara, T. Namba, et al., “First millimeter-wave spectroscopy ofground-state positronium,” Prog. Theor. Exp. Phys., (2015) 011C01 (10 pp.).

AWARDS
Professor T. Idehara awarded the Kenneth J. Button Prize

During the 41th International Conference on Infrared, Millimeter,
and Terahertz Waves (IRMMW-THz 2016) Professor Toshitaka
Idehara from FIR UF has been awarded the prestigious Button
Prize for:“outstanding contributions to the development of high power THz radiation
sources (harmonic gyrotrons) and their applications to high power THz
spectroscopy”.

PERSONALIA
Andrei Viktorovich Gaponov-Grekhov (on his 90th birthday)

June 7, 2016 marks 90 years of the famous Russian scientist, Academician Gaponov-Grekhov.

Academician Gaponov-Grekhov is an author of fundamental works in the field of electrodynamics,
plasma physics, physical electronics, the electrodynamics of a nonlinear medium, and the theory of
distributed nonlinear systems. He has conducted theoretical and experimental research on induced
cyclotron radiation, which allowed the development of masers on electron cyclotron resonance (State
Prize of the USSR, 1967) and most notably the gyrotron. His remarkable achievements as a scientist andlongstanding leader of the Institute of Applied Physics of the Russian Academy of Sciences (IAP-RAS) in
Nizhni Novgorod have been reviewed in a recent memorial paper dedicated to his jubilee:
Bunkin F V, Denisov G G, Zheleznyakov V V, Zakharov V E, Zelenyi L M, Litvak A G, Mareev E A,
Mesyats G A, Sergeev A M, Talanov V I, Fortov V E, Khazanov E A "Andrei Viktorovich GaponovGrekhov (on his 90th birthday)" Phys. Usp., vol. 59 613–615 (2016). DOI: 10.3367/UFNe.2016.
05.037805.
For more details about the brilliant carrier and the most significant achievements of Academician
Gaponov-Grekhov please visit:

http://ipfran.ru/english/staff/Gaponov-Grehov_1e.html

LIST OF SELECTED RECENT PUBLICATIONS
Bibliography and links to selected recent publications on topics related to the research
field of the International ConsortiumThis is a cumulative list of selected publications in chronological order as collected from various bibliographicaland alert services and published after June 2016, i.e. after issuing the previous Newsletter #3

A. Publications by authors from the institutions participating in the International Consortium
Glyavin M.Yu., Denisov G.G., Zapevalov V.E., Koshelev M.A., Tretyakov M.Yu., Tsvetkov A.I. “Highpower terahertz sources for spectroscopy and material diagnostics,” Physics Uspekhi, vol. 59, no. 6(2016). DOI: 10.3367/UFNe.2016.02.037801.
http://iopscience.iop.org/article/10.3367/UFNe.2016.02.037801/meta;jsessionid=4C57F3E6382F0729264
8116992655AD7.c6.iopscience.cld.iop.org

Gitlin M.S., Glyavin M.Yu., Fedotov A.E., Tsvetkov A.I., “Imaging the millimeter wave intensity profiles
using a visible continuum radiation from a Cs–Xe DC discharge (a review): Part II. Demonstration of
application capabilities of the technique,” Uspekhi prikladnoi fiziki (Advances in Applied Physics) 4 (2)(2016) 111-125 (in Russian).
http://advance.orion-ir.ru/UPF-16/2/UPF-4-2-111.pdf
Glyavin M.Yu., Goykhman M.B., Gromov A.V., Palitsin A.V., Panin A.N., Rodin Yu.V., Fil’chenkov S.E.,“A waveguide high-pass filter system for measuring the spectrum of pulsed terahertz sources,” Infrared
Physics & Technology, vol. 76 (2016) 11-20. DOI: 10.1016/j.infrared.2015.12.031.
http://www.sciencedirect.com/science/article/pii/S1350449515301456
Kalynov Yu.K., Osharin I.V., Savilov A.V., “A method for suppression of spurious fundamental-harmonic
waves in gyrotrons operating at the second cyclotron harmonic,” Physics of Plasmas, vol. 23 (2016)053116. DOI: 10.1063/1.4951723.
http://scitation.aip.org/content/aip/journal/pop/23/5/10.1063/1.4951723
Girka I.O., Girka V.O., Sydora R.D., Thumm M., “Instability of surface electron cyclotron TM-modes
influenced by non-monochromatic alternating electric field,” Physics of Plasmas, vol. 23 (2016) 062106.
DOI: 10.1063/1.4953421.
http://scitation.aip.org/content/aip/journal/pop/23/6/10.1063/1.4953421
Firihu M.Z., Sudiana I.N., Mitsudo S., “Microwaves Enhanced Sintering Mechanisms in Alumina
Ceramic Sintering Experiments,” Contemporary Engineering Sciences, vol. 9, no. 5 (2016) 237-247. DOI:
10.12988/ces.2016.615.
http://m-hikari.com/ces/ces2016/ces5-8-2016/p/sudianaCES5-8-2016.pdf
Kalaria P., Avramidis K.A., Franck J., Gantenbein G., Illy S., Pagonakis I.Gr., Thumm M, Jelonnek J., "Afast frequency step-tunable 236 GHz gyrotron design for DEMO," 2016 German Microwave Conference(GeMiC), Bochum, 2016, pp. 377-380. DOI: 10.1109/GEMIC.2016.7461635.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7461635&isnumber=7461526
Soldatov S., Umminger M., Heinzel A., Link G., Lepers B., Jelonnek J., “Dielectric characterization of
concrete at high temperatures,” Cement and Concrete Composites, (2016). DOI: 10.1016/j.cemconcomp.
2016.01.006.
http://www.sciencedirect.com/science/article/pii/S0958946516300129

Bakunin V.L., Denisov G.G., Novozhilova Yu.V., “Zones of Frequency Locking by an External Signal in a
Multimode Gyrotron of a Megawatt Power Level,” Radiophysics and Quantum Electronics, (2016). DOI:
10.1007/s11141-016-9663-0.
http://link.springer.com/article/10.1007%2Fs11141-016-9663-0
Ginzburg N.S., Denisov G.G., Vilkov M.N., Zotova I.V., Sergeev A.S., “Generation of “gigantic” ultrashort microwave pulses based on passive mode-locking effect in electron oscillators with saturable
absorber in the feedback loop,” Physics of Plasmas, vol. 23 (2016) 050702. DOI: 10.1063/1.4948553.
http://scitation.aip.org/content/aip/journal/pop/23/5/10.1063/1.4948553
Peskov N.Yu., Bandurkin I.V., Kaminsky A.K., Kuzikov S.V., Perelstein E.A., Savilov A.V., Sedykh S.N.,
Vikharev A.A., “High-power free-electron maser operated in a two-mode frequency-multiplying regime,”
Phys. Rev. Accel. Beams, vol. 19 (2016) 060704. DOI: 10.1103/PhysRevAccelBeams.19.060704.
http://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.19.060704
Semenov V. E., Rakova E.I., Glyavin M.Yu., Nusinovich G.S., “Initial Stage of the Microwave Ionization
Wave Within a 1D Model,” Radiophysics and Quantum Electronics (2016). DOI: 10.1007/s11141-0169664-z.
http://link.springer.com/article/10.1007%2Fs11141-016-9664-z
Semenov V.E., Rakova E.I.,Glyavin M.Yu., Nusinovich G.S., “Breakdown simulations in a focusedmicrowave beam within the simplified model,” Physics of Plasmas, vol. 23 (2016) 073109. DOI:
10.1063/1.4958313.
http://scitation.aip.org/content/aip/journal/pop/23/7/10.1063/1.4958313
Ginzburg N.S., Glyavin M.Y., Malkin A.M., Manuilov V.N., Rozental R.M., Sedov A.S., Sergeev AS.,
Zaslavsky V.Y., Zotova I.V., Idehara T., "Improvement of Stability of High Cyclotron Harmonic Operationin the Double-Beam THz Gyrotrons," IEEE Trans. on Plasma Science, (2016) pp. 7. DOI:
10.1109/TPS.2016.2585307.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7508412&isnumber=4360151
Samsonov S.V., Bogdashov A.A., Gachev I.G., Denisov G.G., Mishakin S.V., "Proof-of-Principle
Experiment on High-Power Gyrotron Traveling-Wave Tube With a Microwave System for Driving andExtracting Power Through One Window, "IEEE Microwave and Wireless Components Letters, vol. 26,
no. 4 (2016) 288-290. DOI: 10.1109/LMWC.2016.2537541.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7433972&isnumber=7448488
Kalynov Yu.K., Osharin I.V., Savilov A.V., “A method for suppression of spurious fundamental-harmonic
waves in gyrotrons operating at the second cyclotron harmonic,” Physics of Plasmas, vol. 23 (2016)053116. DOI: 10.1063/1.4951723.
http://scitation.aip.org/content/aip/journal/pop/23/5/10.1063/1.4951723
Manuilov V.N., Semenov V.E., "Ion Compensation for Space Charge in the Helical Electron Beams of
Gyrotrons," Radiophysics and Quantum Electronics, (2016) 1-10. DOI:10.1007/s11141-016-9673-y.
http://link.springer.com/article/10.1007/s11141-016-9673-y
Franck J., Avramidis K.A., Gantenbein G., Illy S., Pagonakis I.G., Thumm M., Jelonnek J., "Direct
Voltage Depression Calculation of Arbitrary Electron Beams in Misaligned Coaxial Gyrotron Cavities,"
IEEE Trans. on Electron Devices, (2016) 7 pp. DOI: 10.1109/TED.2016.2592533.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7527693&isnumber=4358746

Pagonakis I.Gr., Illy S., Thumm M., “Influence of emitter ring manufacturing tolerances on electron beam
quality of high power gyrotrons,” Physics of Plasmas, vol.23 (2016) 083103. DOI: 10.1063/1.4959113.
http://scitation.aip.org/content/aip/journal/pop/23/8/10.1063/1.4959113
Kuftin A.N., Manuilov V.N., "The Electron-Optical System of a Gyrotron with an Operating Frequency of
263 GHz for Spectroscopic Research," Radiophysics and Quantum Electronics, (2016) 1-7. DOI:
10.1007/s11141-016-9682-x.
http://link.springer.com/article/10.1007%2Fs11141-016-9682-x
Illy S., Gantenbein G., Pagonakis I.G., Resznicki T., Zhang J., Jelonnek J., "Studies of transientphenomena in the magnetron injection gun of high power gyrotrons using the esray beam optics code,"2016 IEEE Int. Conference on Plasma Science (ICOPS), Banff, AB, Canada, 2016, pp. 1-1.
DOI:10.1109/PLASMA.2016.7533955.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7533955&isnumber=7533933
Ueda K., Matsuki Y., Fujiwara T., Tatematsu Y., Ogawa I., Idehara T., "Further Characterization of 394GHz Gyrotron FU CW GII with Additional PID Control System for 600-MHz DNP-SSNMR
Spectroscopy," Journal of Infrared, Millimeter, and Terahertz Waves, vol. 37, no. 9 (2016) 825-836. DOI:
10.1007/s10762-016-0276-7.
http://link.springer.com/article/10.1007/s10762-016-0276-7?no-access=true
Lin M.C., Illy S., Thumm M., Jelonnek J., "Validation of conformal finite difference time domain method
for accurate higher order mode simulations," 2016 IEEE International Conference on Plasma Science(ICOPS), Banff, AB, Canada, 2016, pp. 1-1. DOI:
10.1109/PLASMA.2016.7534049.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7534049&isnumber=7533933
Glyavin M.Yu., Manuilov V.N., Sominskii G.G., Taradaev E.P., Tumareva T.A., “The Concept of an
Electron-Optical System with Field Emitter for a Spectroscopic Gyrotron,” Infrared Physics &Technology, Available online 18 August 2016, ISSN 1350-4495. DOI:10.1016/j.infrared.2016.08.006.
http://www.sciencedirect.com/science/article/pii/S1350449516303334
Bykov Y.V., Egorov S. V., Eremeev A. G., Kholoptsev V.V., et al., “On the Mechanism of Microwave
Flash Sintering of Ceramics, Materials, vol. 9, no. 8, (2016) 1996-1944. DOI: 10.3390/ma9080684. Open
Access:http://www.mdpi.com/1996-1944/9/8/684
Denisov G.G., et al., "45 GHz/20 kW gyrotron-based system for ECR ION source," 2016 IEEE
International Conference on Plasma Science (ICOPS), Banff, AB, Canada, 2016, pp. 1-1.
DOI:10.1109/PLASMA.2016.7533987.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7533987&isnumber=7533933
Morikawa O., Yamamoto K., Kurihara K., Tani M., Kuwashima F., Hangyo M., "Sub-terahertz imaging
using time-domain signals obtained with photoconductive spiral antennas," J. Opt. Soc. Am. B, vol. 33(2016) 1940-1948. DOI: 10.1364/JOSAB.33.001940.
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-33-9-1940
Ginzburg N.S., Kocharovskaya E.R., “Quasilinear theory of terahertz free-electron lasers based on
Compton scattering of incoherent pump wave by intense relativistic electron beam,” Phys. Rev.
Acce.erators and Beams, vol. 19 (2016) 080701. DOI:10.1103/PhysRevAccel Beams.19.080701.
http://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.19.080701

Dumbrajs O., Nusinovich G.S., “Self-consistent non-stationary theory of the gyrotron,” Physics ofPlasmas, vol. 23 (2016) 083125. DOI:10.1063/1.4961962.
http://scitation.aip.org/content/aip/journal/pop/23/8/10.1063/1.4961962
Kasparek W., Doelman N., Stober J., Maraschek M., et al., “ NTM stabilization by alternating O-point EC
current drive using a high-power diplexer,” Nuclear Fusion, vol. 56, no. 12 (2016) 126001 (16 pp). DOI:
10.1088/0029-5515/56/12/126001.
http://iopscience.iop.org/article/10.1088/0029-5515/56/12/126001
Kalaria P.C., Avramidis K.A., Franck J, Gantenbein G., Illy S., Pagonakis I.Gr., Thumm M., Jelonnek J.,“Systematic cavity design approach for a multi-frequency gyrotron for DEMO and study of its RF
behavior,” Physics of Plasmas, vol. 23 (2016) 092503. DOI: 10.1063/1.4962238.
http://scitation.aip.org/content/aip/journal/pop/23/9/10.1063/1.4962238
Arzhannikov A.V., Ginzburg N.S., Kalinin P.V., Kuznetsov S.A., Malkin A.M., Peskov N.Yu., Sergeev
A.S., Sinitsky S.L., Stepanov V.D., Thumm M., Zaslavsky V.Yu., “Using Two-Dimensional Distributed
Feedback for Synchronization of Radiation from Two Parallel-Sheet Electron Beams in a Free-Electron
Maser,” Phys. Rev. Lett., vol. 117, no. 11 (2016) 114801. DOI: 10.1103/PhysRevLett.117.114801.
http://link.aps.org/doi/10.1103/PhysRevLett.117.114801
Glyavin M.Yu., Oparina Yu.S., Savilov A.V., Sedov A.S., “Optimal parameters of gyrotrons with weakelectron-wave interaction,” Physics of Plasmas, vol. 23 (2016) 093108. DOI:10.1063/1.4962523.
http://scitation.aip.org/content/aip/journal/pop/23/9/10.1063/1.4962523
Dumbrajs O., Saito T., Tatematsu Y., Yamaguchi Y., “Influence of the electron velocity spread and thebeam width on the efficiency and mode competition in the high-power pulsed gyrotron for 300 GHz bandcollective Thomson scattering diagnostics in the large helical device,” Physics of Plasmas, vol. 23 (2016)093109. DOI:10.1063/1.4962575.
http://scitation.aip.org/content/aip/journal/pop/23/9/10.1063/1.4962575
Sudiana I.N., Mitsudo S., Nishiwaki T., Susilowati P.E., Lestari L., Firihu M.Z., Aripin H., “Synthesis
and Characterization of Microwave Sintered Silica Xerogel Produced from Rice Husk Ash,” Journal of
Physics: Conference Series, vol. 739, no. 1 (2016) 012059. DOI: 10.1088/1742-6596/739/1/012059.
http://tinyurl.com/hg54guj
Bykov Yu.V., Egorov S.V., Eremeev A.G., Kholoptsev V.V., Plotnikov I.V., Rybakov K.I., Sorokin A.A.,“Sintering of Oxide Ceramics under Rapid Microwave Heating,” Processing, Properties, and Design ofAdvanced Ceramics and Composites: Ceramic Transactions (John Wiley & Sons, Inc., 2016) vol.
CCLIX6. DOI:10.1002/9781119323303.ch20.
http://onlinelibrary.wiley.com/doi/10.1002/9781119323303.ch20/summary;jsessionid=94D208E58721F42
E1C7D39A5409634DA.f03t01
Idehara T., Sabchevski S.P. “Gyrotrons for High-Power Terahertz Science and Technology at FIR UF,”
Journal of Infrared, Millimeter, and Terahertz Waves (2016) 25 pp. DOI: 10.1007/s10762-016-0314-5.
http://link.springer.com/article/10.1007/s10762-016-0314-5
Presto J.M.M., Prieto E.A.P., Omambac K.M., Pauline C. Afalla J.P.C., Lumantas D.A.O., Salvador A.A.,
Somintac A.S., Estacio E.S., Yamamoto K., Tani M., “Confined photocarrier transport in InAs pyramidal
quantum dots via terahertz time-domain spectroscopy," Optics Express, vol. 23, n. 11 (2016) 1453214540. DOI:10.1364/OE.23.014532.
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-11-14532

Miyazaki A., Yamazaki T., Idehara T., Tatematsu Y., “Direct Mesurement of the Superfine Spliting of
Positronium,” Isotope News, n. 741 (2016) 31-35 (in Japanese).
http://www.jrias.or.jp/books/pdf/201601_TENBO_MIYAZAKI_HOKA.pdf
B.

Publications by other authors

Arzhannikov A.V. et al., "Dynamics and Spectral Composition of Subterahertz Emission From Plasma
Column Due to Two-Stream Instability of Strong Relativistic Electron Beam," IEEE Trans. on Terahertz
Science and Technology, vol. 6, no. 2 (2016) 245-252. DOI:
10.1109/TTHZ.2016.2525783.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7416251&isnumber=7438979
Frolov N.S., Kurkin S.A., Khramova M.V., Badarin A.A., Koronovskii A.A., et al., "Perspective sub-THz
powerful microwave generator "nanovircator" for T-rays biomedical diagnostics ", Proc. SPIE 9917,
Saratov Fall Meeting 2015: Third International Symposium on Optics and Biophotonics and Seventh
Finnish-Russian Photonics and Laser Symposium (PALS), 991721 (April 21, 2016);
DOI:10.1117/12.2229627.
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2516992

Huang W.R., Fallahi A., Wu X., Nanni E.N., Calendron A.-L., Cankaya H., Zhang D., Ravi K., Hong K.H., Kärtner F.X., “Terahertz-driven, all-optical electron gun,” arXiv:1605.06667 (2016).
https://arxiv.org/abs/1605.06667
Zhang Luqi, Wei Yanyu, Guo Guo, Xu Jin, Wei Wanghe, Wang Yuanyuan, Ding Chong, Jiang Xuebing,
Zhao Guoqing, Gong Yubin, Wang Wenxiang, Park Gun-Sik, “An ultra-broadband watt-level terahertz
BWO based upon novel sine shape ridge waveguide,” Journal of Physics D: Applied Physics, vol. 49, n.
23 (2016) 235102. DOI: 10.1088/0022-3727/49/23/235102.
http://iopscience.iop.org/article/10.1088/0022-3727/49/23/235102/meta
Demirskyi D., Vasylkiv O., “Microstructure and mechanical properties of boron suboxide ceramics
prepared by pressureless microwave sintering,” Ceramics International, Available online 24 May 2016,
ISSN 0272-8842. DOI: 10.1016/j.ceramint.2016.05.151.
http://www.sciencedirect.com/science/article/pii/S0272884216307556
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slow-wave structure,” Review of Sci. Instruments, vol. 87 (2016) 053308. DOI: 10.1063/ 1.4950904.
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Wang W., Song T., Liu D., Zhuang Q., Liu S., "Quasi-Optical Mode Converter for a 0.42-THz TE₂₆
Mode Pulsed Gyrotron Oscillator," IEEE Trans. on Plasma Science , (20116) pp. 4. DOI:10.1109/
TPS.2016.2603161.
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7562468&isnumber=4360151
Liu G., Wang Y., Pu Y., Luo Y., "Design and Microwave Measurement of a Novel Compact TE₀n/TE₁n Mode Converter," IEEE Trans. on Microwave Theory and Techniques, (2016) 9 pp. DOI:10.1109/
TMTT.2016.2608770.
http://ieeexplore.ieee.org/document/7579575/
Hong I.S., Kim Y., Choi S.J., Heo J.I., Jin H.C., Park B.S., "A preliminary study of the electron cyclotron
resonance ion source for the RAON injector," Journal of the Korean Physical Society, vol. 69, no. 6(2016) 953-956. DOI: 10.3938/jkps.69.953.
http://link.springer.com/article/10.3938/jkps.69.953
Du C.H., Qi X.B., Liu P.K., "Theoretical Study of a Broadband Quasi-Optical Mode Converter for Pulse
Gyrotron Devices," IEEE Trans. on Plasma Science, vol. 44, no. 10 (2016) 2348-2355. DOI:10.1109/
TPS.2016.2606497.
http://ieeexplore.ieee.org/abstract/document/7572128/
M. Ng Mou Kehn, "Corrugated Waveguides With Stepped Ridges and Stratified Core for High-Power
Transmission: Modal Analysis by Radial-Cavity and Concentric Multilayer Green's Functions," IEEE
Trans. on Microwave Theory and Techniques, (2016) pp.20. DOI: 10.1109/TMTT.2016.2605669.
http://ieeexplore.ieee.org/abstract/document/7574339/
Chao-Kuei Lee, Chung-Lun Wu, Han-Wei Zhang, Chun-Ta Wang, Tsung-Hsien Lin, “Millimeter-Scaled
Thick Cell Gap Measurement by Terahertz Spectroscopy Technology,” IEEE Photonics Journal, vol. 8, no.
3 (2016) 6803508. DOI: 10.1109/JPHOT.2016.2571958. Open Access:
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7484854
Takahashi M., Ohnishi N., “Numerical study of breakdown pattern induced by an intense microwave
under nitrogen and argon gases,” Japanese Journal of Applied Physics, vol. 55, no. 7S2 (2016) 07LD02.
DOI: 10.7567/JJAP.55.07LD02.
http://iopscience.iop.org/article/10.7567/JJAP.55.07LD02/meta
Hung C.L., Yeh Y.S., Chang T.H., Fang R.S., “A Stable 0.2-THz Coaxial-Waveguide Gyrotron TravelingWave-Tube Amplifier with Distributed Losses,” Journal of Infrared, Millimeter, and Terahertz Waves,(2016) pp. DOI: 10.1007/s10762-016-0302-9.
http://link.springer.com/article/10.1007/s10762-016-0302-9
Kiarash Ahi, Mehdi Anwar, “Advanced terahertz techniques for quality control and counterfeit detection,”
Proc. SPIE 9856, Terahertz Physics, Devices, and Systems X: Advanced Applications in Industry and
Defense,98560G(May
26,
2016);
DOI:
10.1117/12.2228684.
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2526470
Bo Feng, Exian Liu, Ziming Wang, Weicheng Cai, Hongfei Liu, Shuo Wang, Taiyuan Liang, Wei Xiao,
Jianjun Liu, “Generation of terahertz hollow beams by a photonic quasi-crystal flat lens,” Applied Physics
Express, vol. 9, no. 6 (2016) 062003. DOI:10.7567/APEX.9.062003.
http://stacks.iop.org/1882-0786/9/i=6/a=062003

C.

Patents

FERROELECTRIC EMITTER FOR ELECTRON BEAM EMISSION AND RADIATION GENERATION,

United States Patent Application 20160148773.
Inventors: Einat, Moshe (Ariel, IL). Publication Date: 05/26/2016.
http://www.freepatentsonline.com/y2016/0148773.html
APPARATUS AND METHOD FOR TEMPERING GLASS USING ELECTROMAGNETIC RADIATION,

United States Patent Application 20160159678.
Inventors: Sklyarevich, Vladislav (Bensalem, PA, US) and Shevelev, Mykhaylo (Bensalem, PA, US).
Publication Date: 06/09/2016.
http://www.freepatentsonline.com/y2016/0159678.html
WAVEGUIDE ELEMENT, United States Patent 9391428

Inventors: Koyama, Yasushi (Kamakura, JP), Tateishi, Yoshinori (Naka-gun, JP).
Publication Date: 07/12/2016.
http://www.freepatentsonline.com/9391428.html
TERAHERTZ RECEIVER AND TERAHERTZ IMAGING SENSOR APPARATUS FOR HIGH DATA RATE,

United States Patent Application 20160209268
Inventors: Lee, Sang-gug (Yuseong-gu, KR), Kim, Sun-a (Yuseong-gu, KR), Park, Dae-woong (Yuseonggu, KR), Han, Seok-kyun (Yuseong-gu, KR). Publication Date: 07/21/2016.
http://www.freepatentsonline.com/y2016/0209268.html
COMPACT MAGNET SYSTEM FOR A HIGH-POWER MILLIMETER-WAVE GYROTRON, Patentapplication number: 20160078992.
Inventors: Larry R. Barnett (Normandy, TN, US).
Publication date: 03/17/2016.
http://www.patentsencyclopedia.com/app/20160078992
Gyrotron Technology Inc. Files Provisional Patent for Rapid Joining of Different Layers of Non-Metallic
Materials (September 22, 2016)
Visit: http://tinyurl.com/hk8ylwo
GYROTRON WHISPERING GALLERY MODE COUPLER FOR DIRECT COUPLING OF RF INTO HE11
WAVEGUIDE, International Application No.: PCT/US2015/016461

Inventors: Neilson, Jeffrey; (US). Publication Date: 25.08.2016.
http://tinyurl.com/zks8mj8
MICROWAVE COUPLER FOR OPTIMIZING A NMR PROBE HEAD FOR MAS-DNP. US Patent

20160195593
Inventors: Armin Purea, Frank Engelke, Alexander Krahn. Publication Date: 07.07.2016.
http://tinyurl.com/jxnrmck
APPARATUS AND METHOD FOR TEMPERING GLASS USING ELECTROMAGNETIC RADIATION, US

Patent 20160159678.
Inventors: Vladislav Sklyarevich, Mykhaylo Shevelev. Publication Date: 09.06.2016.
http://tinyurl.com/hx6d92c
A HEATING AND SHAPING SYSTEM USING MICROWAVE FOCUSED BEAM HEATING, EP3004000.

Inventors: JIAO YU, BONADDIO ROBERT M. KOEPFINGER JOSEPH G, MEDZIUS JOSEPH,
PRIDDY JAMES FRANKLIN, SCHRIER RUSSELL WILLIS, WARREN DENNIS D, YU CHAO.
Publication Date: 13.04.2016.
http://tinyurl.com/jlczykw

NEW BOOKS
Albert Sabban, “Wideband RF Technologies and Antennas in Microwave Frequencies” (Wiley, 2016) 464
pages. ISBN: 978-1-119-04869-5.
http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1119048699.html
John Pahl, “Interference Analysis: Modelling Radio Systems for Spectrum Management,” (Wiley, 2016)
512 pages. ISBN: 978-1-119-06528-9.
http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1119065283.html
Yuriy Sirenko, and Lyudmyla Velychko (Eds.) “Electromagnetic Waves in Complex Systems (Selected
Theoretical and Applied Problems),” Springer Series on Atomic, Optical, and Plasma Physics, vol. 91(2016) 446 pages. DOI: 10.1007/978-3-319-31631-4. ISBN 978-3 -319-31630-7.
http://www.springer.com/gp/book/9783319316307?wt_mc=ThirdParty.SpringerLink.3.EPR653.About_eBook
Kenro Miyamoto “Plasma Physics for Controlled Fusion”, Springer Series on Atomic, Optical, andPlasma Physics, vol. 92 (2016). ISBN: 978-3-662-49780-7 (Print) 978-3-662-49781-4 (Online). DOI:
10.1007/978-3-662-49781-4.
http://link.springer.com/book/10.1007/978-3-662-49781-4
Masanobu Iwanaga, “Plasmonic Resonators: Fundamentals, Advances, and Applications,” (Pan Stanford
Publishing, 2016). Print ISBN: 9789814745062 eBook ISBN: 9789814745079 DOI: 10.4032/
9789814745079.
https://www.crcpress.com/Plasmonic-Resonators-Fundamentals-Advances-and-Applications/Iwanaga/p/book/9789814745062

Yuping Duan, Hongtao Guan, “Microwave Absorbing Materials,” (Pan Stanford Publishing, 2016). ISBN13: 978-9814745109, ISBN-10: 9814745103.
https://www.amazon.com/Microwave-Absorbing-Materials-Yuping-Duan/dp/9814745103
Tie Jun Cui, Wen Xuan Tang, Xin Mi Yang, Zhong Lei Mei, Wei Xiang Jiang, “Metamaterials: Beyond
Crystals, Noncrystals, and Quasicrystals,” (CRC Press, 2016). ISBN 9781482223101.
https://www.crcpress.com/Metamaterials-Beyond-Crystals-Noncrystals-and-Quasicrystals/Cui-TangYang-Mei-Jiang/p/book/9781482223101
Gorur Govinda Raju, “Dielectrics in Electric Fields, Second Edition,” (CRC Press, 2016). ISBN
9781482231137.
https://www.crcpress.com/Dielectrics-in-Electric-Fields-Second-Edition/Raju/p/book/97814 8223 1137
Hua Wang and Kaushik Sengupta, “RF and mm-Wave Power Generation in Silicon,” (Academic Press,
2016). Print Book ISBN: 9780124080522, eBook ISBN: 9780124095229.
http://store.elsevier.com/RF-and-mm-Wave-Power-Generation-in-Silicon/isbn-9780124080 522/

NEWS FROM THE NET (OUR BROADER HORIZONTS)
Terahertz waves rearrange polymer molecules
Using terahertz laser, scientists change the macromolecular conformation of a polymer
http://www.riken.jp/en/pr/press/2016/20160607_2/
See the original paper: Hiromichi Hoshina, Hal Suzuki, Chiko Otani, Masaya Nagai, Keigo Kawase,
Akinori Irizawa, Goro Isoyama, "Polymer Morphological Change Induced by Terahertz Irradiation",
Scientific Reports, DOI: 10.1038/srep27180. Open Access at:
http://www.nature.com/articles/srep27180
Convergence of Electronics and Photonics Technologies for Enabling Terahertz Applications
CELTA is the acronym for Convergence of Electronics and Photonics Technologies for Enabling Terahertz
Applications. CELTA aims to produce the next generation of researchers who will enable Europe to take aleading role in the multidisciplinary area of utilising Terahertz technology for applications involving
components and complete systems for sensing, instrumentation, imaging, spectroscopy, andcommunications. For more detail, visit the vebsite of the project:
http://www.celta-itn.eu/
A new imaging system can read closed books
In the latest issue of Nature Communications, the researchers describe a prototype of the system, which
they tested on a stack of papers, each with one letter printed on it. The system was able to correctly
identify the letters on the top nine sheets.
http://news.mit.edu/2016/computational-imaging-method-reads-closed-books-0909
The open access original paper “Terahertz time-gated spectral imaging for content extraction throughlayered structures” by A. Redo-Sanchez, et al., published in Nature Communications (DOI:
10.1038/ncomms12665 is available at:
http://www.nature.com/articles/ncomms12665
Rectifying light
An optical rectifying antenna, or ‘rectenna’, converts optical-frequency electromagnetic radiation into DC
output. In these rectennas, light is treated as electromagnetic waves that are absorbed in micron-scaleantennas and rectified by ultra-high-speed diodes. Even though the light is not absorbed in the same waythat semiconductor solar cells absorb photons, the quantum nature of the electromagnetic fields is evident
in the devices. This brings up fascinating questions about the nature of ultra-high-frequency rectification.
In their paper the authors Saumil Joshi and Garret Moddel have been investigating optical rectennas for
power harvesting and detection [Joshi S., Moddel G., “Optical rectenna operation: where Maxwell meets
Einstein,” J. Phys. D: Appl. Phys., vol. 49 (2016) 265602].
Visit: https://jphysplus.iop.org/2016/07/21/rectifying-light/
http://iopscience.iop.org/article/10.1088/0022-3727/49/26/265602/pdf
Manipulating superconducting plasma waves with terahertz light
An international team of researchers led by Andrea Cavalleri from the Max Planck Institute for the
Structure and Dynamics of Matter at CFEL in Hamburg utilized the nonlinear interaction between aterahertz light field and a superconducting plasma wave in a high temperature cuprate superconductor toamplify the latter. This resulted in a more coherent superconductor, which is less susceptible to thermal
fluctuations. Due to the non-dissipative superconducting nature of the plasma wave, the study opens up
new avenues for "plasmonics", a field of science utilizing plasma waves for transmitting information.
Read more at: http://phys.org/news/2016-07-superconducting-plasma-terahertz.html#jCp

Physicists Develop Novel Electron Microscope Capable of Mapping Electromagnetic Waveforms
Researchers at the Laboratory for Attosecond Physics, jointly operated by LMU and the Max Planck
Institute for Quantum Optics (MPQ), who built an electron microscope capable of imaging highfrequency electromagnetic fields and tracing their ultrafast dynamics.
The new electron microscope exploits the ultrashort pulses of laser light. These pulses only last for a few
femtoseconds. Bunches of electrons that consist of very few particles are generated using these laser
pulses, and then temporally compressed by terahertz (1012 Hz) near-infrared radiation. The LMU andMPQ scientists, who are part of the research team in Ultrafast Electron Imaging, first demonstrated thismethod earlier this year in the Science journal, where they demonstrated the techniques capability to
produce electron pulses, which are shorter than an optical half-cycle.
Visit: http://www.azoquantum.com/News.aspx?newsID=4773
Latest Research and Reviews in Terahertz Optics
Terahertz optics is a branch of optics and photonics that studies electromagnetic radiation with awavelength between 0.1 and 1 millimetre, so-called because this corresponds to a frequency ofapproximately one terahertz.
Several very interesting review papers on the recent progress of THz Optics published in September andOctober 2016 have been published in Nature. Please visit:
http://www.nature.com/subjects/terahertz-optics
Novel method of spin control discovered
An international team of scientists from Germany, the Netherlands and Russia has successfully
demonstrated a novel, highly efficient and ultrafast magnetization control scheme by employing
electromagnetic waves oscillating at terahertz frequencies. These findings are of great importance for theunderstanding of light-magnetism interactions on extremely short timescales and for information
technology of the future.
For more information visit:https://idw-online.de/de/news660013
The efforts to realize a Bloch oscillator continue
A theory developed by the Nobel laureate Felix Bloch suggested that a specially structured material suchas super-lattices (SL) that allowed electrons to oscillate in a particular way might be able to conduct
terahertz signals. So far however, the formation of high field domains in the semiconductor super-lattices
has been hindering the realization of a Bloch oscillator proposed by Esaki and Tsu more than 40 years
ago. The firs attempt to solve this problem using sub-THz radiation produced by a gyrotron has been
made in a series of experiments for investigation of the current suppression in superconductor SL driven
by intense sub-THz wave [Y. Sakasegawa, T. Idehara, Y. Yamaguchi, S. Mitsudo, K. Hirakawa, Current
suppression in semiconductor superlattices driven by intense sub-Thz radiation from a gyrotron, Proc.
17th Int. Conf. on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures EDISON

17 (7–12 August, 2011, Santa Barbara, California) P1.18]. Recently (decades after Bloch's theory),
Stanford physicists may have developed materials that enable these theorized oscillations, someday
allowing for improvements in technologies from solar cells to airport scanners. In their study, theresearchers created a two-dimensional SL by sandwiching a sheet of atomically thin graphene in between
two sheets of electrically insulating boron nitride. The atoms in the graphene and boron nitride haveslightly different spacing, so when they are stacked on top of each other they create a special wave
interference pattern called a moiré pattern. So far this research did not actually produce a Blochoscillator, but suggests promising novel material for its possible realization in near future.
For more details, please visit: http://m.phys.org/news/2016-10-theorized-mechanism-life.html
and the original paper:
Lee M., Wallbank J.R., Gallagher P., Watanabe K., Taniguchi T., Fal’ko V.I., Goldhaber-Gordon
D.,”Ballistic miniband conduction in a graphene superlattice,” vol. 353, no. 6307 (2016) 1526-1529.
DOI: 10.1126/science.aaf1095.
at: http://science.sciencemag.org/content/353/6307/1526