bluuebunny/crossref_metadata_2025_split huggingface dataset:
Carrier-wave population transfer in semiconductors
Authors: Zuo R , Song X , Meier T , Yang W 
Published: June 2020

Synopsis
We show that a novel carrier-wave population transfer, i.e., interband excitations are confined to an extremely short time window due to their coupling to the intraband motion, is responsible for the enhancement of the interband HHG and the anomalous carrier-envelope phase dependence observed in recent experiments on semiconductors. The results give the answers of how inter- and intraband dynamics are coupled together and why the interband polarization can dominate the HHG emission in many semiconductors which is a highly debated topic in the community.
Photoabsorption of atoms in a strong elliptical laser field
Authors: Gao X , Tong X-M 
Published: June 2020

Synopsis
The photoabsorption of hydrogen atoms in a strong elliptical laser field was studied by solving the three-dimensional time-dependent Schrödinger equation. We found that the photoexcitation and ionization probabilities smoothly cross the ionization threshold and we can treate them in a unified way even in the strong elliptical laser field. Such findings may help us to understand how atomic structure affects the strong field ionization near the ionization threshold.
HILITE – A well-defined ion target for laser experiments
Authors: Stallkamp N , Ringleb S , Arndt B , Kiffer M , Kumar S , Paulus G G , Quint W , Stöhlker Th , Vogel M 
Published: June 2020

Synopsis
We present a Penning-trap-based setup for the study of light-matter interactions in the high-power and/or high-intensity laser regime, such as multi-photon ionization and field ionization. The setup applies ion-cloud formation techniques to highly charged ions to the end of specific target preparation, as well as non-destructive detection techniques to identify and quantify the interaction educts and products.
Rescattering photoelectron spectroscopy of CO2 molecule with an analytical returning electron wavepacket
Authors: Okunishi M , Ito Y , Sharma V , Aktar S , Morishita T , Dnestryan A I , Tolstikhin O I , Lucchese R R , Ueda K 
Published: June 2020

Synopsis
Angle-resolved photoelectron momentum distributions of rescattering electron generated by intense infrared laser pulses were measured for CO2 molecules. It is shown that the measured distributions along the outermost backward rescattering caustic are well reproduced by calculations based on a newly developed factorization formula with the analytical returning photoelectron wave packet.
Signatures of Light-Induced Potential Energy Surfaces in

H2+
Authors: Kübel M , Spanner M , Dube Z , Naumov A Yu , Vrakking M J J , Corkum P B , Villeneuve D M , Staudte A 
Published: June 2020

Synopsis
Using theory and Cold Target Recoil Ion Momentum Spectroscopy we find signatures of light-induced molecular potential energy surfaces in the 3-dimensional proton momentum distributions of dissociating

H
2
+

.
Research on bremsstrahlung and Compton scattering in hot warm matters
Authors: Qi Y Y , Wang J G 
Published: June 2020

Synopsis
Bremsstrahlung and Compton scattering are the important processes including the continuum electrons in the hot warm matters. The distribution of the continuum electrons is affected by the plasma screening, which will influence the cross sections of Bremsstrahlung and Compton scattering. In the present work we will investigate the plasma influence on these processes.
Solid State Root Preparation, Characterization and Electrical Properties of NiCuZnFe2O4 / Paraformaldehyde Nanocomposites
Authors: Raju P , Rajesham S , Shankar J , Anjaiah J , Neeraja Rani G 
Published: June 2020

Abstract
In this investigation, the structural and electrical properties of nanocomposites of NiCuZn ferrite (NCZ) and paraformaldehyde (PFD) synthesized by solid state mixing route are reported. Synthesized nanomaterials have been characterized by FT-IR and TGA techniques. FT-IR results confirm the presence of NCZ and PFD in the samples. The DC conductivity measurements have been investigated. The dielectric constant ε’ and dielectric loss ε” were found to increase as the PFD content increased to 50% and to decrease as the PFD content further increased. A dielectric cole-cole diagram can be obtained by plotting the dielectric loss ε” against the dielectric constant ε’. The cole cole diagram is generally used for studying the dielectric polarization characteristics by following the variation of dielectric loss ε” with dielectric constant ε’. From this work, it is possible to deduce interfacial polarization and dipolar polarization from dielectric cole-cole plots.
FTIR, Raman and XRD analysis of graphene oxide films prepared by modified Hummers method
Authors: Surekha G , Krishnaiah K Venkata , Ravi N , Padma Suvarna R 
Published: June 2020

Abstract
Graphene oxide (GO) is a promising material for energy storage device applications. Modified Hummers method (MHM) has been used to prepare GO films from graphite flakes by Sol-Gel method. With the aid of bridging agent dimethyldichlorosiline, structurally fine GO films were prepared. Fourier transform and infra-red (FTIR) spectrum of the GO thin film possesses absorption bands at 461, 594, 670, 803, 1020, 1243, 1457, 1544, 1627, 2850, 2926 and 3429 cm−1. A sharp OH− absorption band was revealed at 3429 cm−1. Two vibrational bands were noticed in the Raman spectrum for pure graphite flakes at 1578 and 2718 cm−1. However, for GO, five Raman vibrational bands were unveiled at 413, 1344, 1597, 2697 and 2945 cm−1. Among these bands, the mode at 1344 cm−1 was assigned to D-band and 1597 cm−1 was assigned to G-band. Compared to D-band, G-band was dominated for the GO films. Several times of centrifugation and ultra-sonication process have aided to obtain more intensity of G-band. In addition, 2D and D + G bands were also revealed in the GO films. X-ray diffraction (XRD) analysis was confirmed that a sharp peak at 10.64 degrees leads to the formation of GO thin film.
Influence of active layer thickness on the cut-off frequency of a-IGZO thin film transistors
Authors: Raj Roshna B , Nair Shiny , Tripathi Ashutosh , Mukundan T , Shahana T K 
Published: June 2020

Abstract
Design optimizations like channel length and gate/contact overlap length scaling are generally used for cut-off frequency (fT
) enhancement of thin film transistors (TFT). But channel length scaling leads to mobility degradation due to contact resistance (RC
). RC
in TFTs is directly proportional to the transfer length (LT
), and is inversely proportional to the overlap length (LOV
). LT
depends upon the metal/semiconductor interfacial resistivity, the vertical bulk resistance and the semiconductor sheet resistance. For the same interfacial contact properties, active layer thickness (Ta
) scaling can be effectively utilized for lowering the vertical bulk resistance thereby lowering LT
and enhancing fT
. To study the effect of thickness scaling on the bandwidth of TFT based amplifiers, a-IGZO thin film transistor of effective channel thickness of 70nm are first fabricated and characterized. Density of states model of this TFT is extracted and numerical simulations are used to study the influence of active layer thickness scaling. By varying the channel lengths from 10μm to 100μm, transfer line method of contact resistance estimation, is used to extract LT
and RC
of devices. As the active layer thickness is varied from 70μm to 30μm it is found that LT
decreases from 1μm to 60 nm, due to lower vertical bulk resistance. This results in a lower RC
and higher μeff, facilitating further scaling of LOV
, leading to enhanced fT
of the device.
Structural, mechanical and electrical properties of NiO - GDC20 composite anodes for low or intermediate temperature solid oxide fuel cells
Authors: Reddy M Narsimha , Vijaya Bhaskar Rao P , Bhoga S S , Bansod Mahesh , babu V Sreehari 
Published: June 2020

Abstract
Nano Composites NiO and 20 mol% gadolinium doped ceria (GDC20) were synthesized as X (NiO) +1-X (Ce0.8 Gd0.2 O2-δ) where (X = 40& 45 wt. %) for intermediate or low temperature operating solid oxide fuel cells (SOFC). For composite anode materials, NiO and GDC20 nano powders were mechanically mixed and calcined from 600 °C to 750 °C. Samples were pelletized and sintered at 1300°C. Systematic study of structure, purity, phase and structural parameters of anode samples were carried out by XRD and SEM. Mechanical strength of anode composites were estimated by Vickers micro-hardness and observed that microhardness of composites are varying from 9.37 GPa to 11.25GPa. Electrical properties D.C conductivity and A.C conductivity of anode composites were computed using four probe method and impedance analyser respectively. The A.C conductivity and their activation energies of the anode samples (compositions X = 40 & 45 wt. %) were computed from RT to 500°C with the impedance spectrosopy data and the conductivities are found 2.95 x 10−3 S/cm and 7.53 x 10−2 S/cm respectively at 500°C (frequency 1.33 MHz). The activation energies of A.C conductivity have observed that decrease with increase in frequencies.
XRD Investigation on Heat Treatment of High Chrome White Cast Irons
Authors: Ngqase M. , Pan X. 
Published: June 2020

Abstract
The properties of hypoeutectic iron of HCWCI containing 25 wt. %Cr-2.5 wt. %C were investigated after destabilisation heat treatments, cooling (slow and fast cooling) to ambient temperatures, their influence on the structure and hardness was investigated using X-ray diffraction (XRD), element distribution analysis and hardness tests. The experimental results show that appropriate heat treatments contribute to a significant improvement on the mechanical properties of selected alloy of HCWCI. The results are discussed in terms of the change in austenite phase at the different destabilisation heat treatment temperatures.
Study on ultrasound velocities and elastic properties of sodium diboro-vanadate glasses
Authors: Harikamalasree N , Reddy Sivasankara , Narayana Reddy C. 
Published: June 2020

Abstract
Glasses with general formula xNa2O-15V2O5-(85-x)B2O3 where x is varied from 5 to 50 mol% in steps of 5 mol%, are fabricated using melt quenching technique. Ultrasound velocities, elastic moduli and Poisson’s ratio exhibit composition dependent trends. Both ultrasound velocities and elastic moduli increases with the addition of Na2O mol% whereas Poisson’s ratio decreases. The introduction of V2O5 results in the formation of diboro-vanadate units similar to that of a diborate. Formation of these diboro-vanadate units leads to a monotonic increase in both sound velocities and elastic moduli.
A Low-Cost Electroencephalography (EEG) Instrumentation for Epileptic Seizure Detection
Authors: Bera Tushar Kanti , Choudhary Sunil , Maiti Toushik , Prasad Barnwal Suraj 
Published: June 2020

Abstract
Noninvasive detection of epileptic seizures can help the patients to save themselves from sudden fall and assist the doctors to study the disease and treat the patient. Generally, an EEG based epileptic seizure detection system consists of EEG sensors, electronic instrumentation and a signal processing algorithm. In this paper, an EEG acquisition system (EAS) has been developed with a multi-stage amplifier and filter blocks. The instrumentation is studied, tested and evaluated with periodic signals generated with a function generator as well as the EEG-like signals simulated by virtual instrumentation (VI) developed with NI MyDAQ controlled by a Lab VIEW. The noise response of the instrumentation developed has been studied with SNR analysis. Results, obtained from the circuit simulation and experimentation conducted with EEG-like waveforms, show that the developed EAS is suitable to process the EEG signals and suitable for epileptic seizures detection systems.
Influence of Slip and Heat and Mass Transfer Effects on Peristaltic motion of Power-law fluid Prone to the Tube
Authors: Subadra N. , Prasad K. Maruthi , Prasad Rao S. Ravi 
Published: June 2020

Abstract
Present study deals with the study of peristaltic motion of a power-law fluid with nanoparticles in a tube with permeable walls. Heat and mass transfer effects and slip effect are studied in this investigation. Axial velocity, pressure gradient and frictional force are expressed analytically and investigated various parameter effects on these flow variables. The present model revealed that, heat transfer coefficient and mass transfer coefficients increases in the region [-1, 0] and decreases in the region [0, 1] with the increase of thermophoresis parameter and shows an opposite behavior with the increase of Brownian motion parameter. Pressure drop increases with the increase of slip parameter. Frictional force decreases with the increase of slip parameter and converges to 1.
High space resolution µ-RWELL for high rate applications
Authors: Bencivenni G. , Felici G. , Gatta M. , Giovannetti M. , Morello G. , Poli Lener M. , de Oliveira R. , Ochi A. , Tskhadadze E. 
Published: June 2020

Abstract
The µ-RWELL is a single-amplification stage resisitive MPGD. The amplification element, realized on a polyimide foil micro-patterned with a high density blind-holes (wells), is embedded through a thin resistive film, in the readout PCB. The introduction of the resistive layer affects the charge spread on the readout electrodes and suppresses the transition from streamer to spark giving the possibility to achieve large gains (>104). As a drawback the capability to stand high particle fluxes is reduced. In order to get rid of such a limitation different resistive layouts with prompt current evacuation schemes have been designed. In this work we present the study of the performance of the high rate layouts done at PSI, together with the measurement of the space resolution for orthogonal and inclined tracks performed at CERN.
A flexible and effcient microscopic simulation of multiple GEM chamber based on Garfield++
Authors: Bellini V , Brio V , Cisbani E , Kmieć K , Lagamba L , Perrino R , Petta C , Re L , Sutera C 
Published: June 2020

Abstract
Microscopic simulations may bring a better understanding of the response of gaseous detectors. Such simulations are computationally demanding, due to the modelling of the low energy processes and to the high segmentation required for the 2D/3D field maps. In MPGD such maps can be much more complex than those of traditional multiwire chambers, due to the heterogeneous materials and more involute geometries, which break the simplifying symmetries featured in the latter. In order to investigate the performance of the triple GEM 2-dimensional tracking chambers being developed for high luminosity experiments with the Super BigBite Spectrometer at Jefferson Laboratory, we have set up a flexible and rather effcient multistep simulation processor based on either ANSYS or GMSH+ELMER for 3D CAD and electrostatic field modelling and then combined to Garfield++. Potential systematic effects from the 3D CAD modellers, the mesh generators and the electrostatic field solvers have been estimated with dedicated simulations; once these effects have been assessed, the results of the multistep approach have been compared to a simplified whole GEM chamber model.
Recent Developments on Precise Timing with the PICOSEC Micromegas Detector
Authors: Manthos I , Bortfeldt J , Brunbauer F , David C , Desforge D , Fanourakis G , Franchi J , Gallinaro M , García F , Giomataris I , Gustavsson T , Guyot C , Iguaz F J , Kebbiri M , Kordas K , Legou P , Liu J , Lupberger M , Maillard O , Maniatis I , Müller H , Niaouris V , Oliveri E , Papaevangelou T , Paraschou K , Pomorski M , Resnati F , Ropelewski L , Sampsonidis D , Schneider T , Schwemling P , Scorsone E , Sohl L , Van Stenis M , Thuiner P , Tsipolitis Y , Tzamarias S E , Veenhof R , Wang X , White S , Zhang Z , Zhou Y 
Published: June 2020

Abstract
The PICOSEC-Micromegas detector was developed for precise timing of the arrival of charged particles with a resolution bellow 30 ps. This contribution, after a brief introduction presents results concerning the PICOSEC-Micromegas response to single photoelectrons, estimation of the photoelectron yield of various photocathode types, as well as its performance to time the arrival of test beam muons. In addition, results based on detailed simulation studies and a stochastic model developed for the understanding of the detector are presented. Finally, results of studies related to the development of large scale PICOSEC-Micromegas detector for practical applications are also presented, in particular, the timing performance of a multi-channel PICOSEC prototype.
Performance of Prototype of Optically Readout TPC with a 55Fe source
Authors: Abritta Costa I. , Baracchini E. , Bellini F. , Benussi L. , Bianco S. , Caponero M. , Cavoto G. , Di Marco E. , Maccarrone G. , Marafini M. , Mazzitelli G. , Messina A. , Piccolo D. , Pinci D. , Renga F. , Rosatelli F. , Saviano G. , Tomassini S. 
Published: June 2020

Abstract
The performances of an optical readout of Time Projection Chambers (TPCs) with multiple Gas Electron Multipliers (GEMs) amplification stages are presented. The detector is characterized by using 55Fe photons converting inside a 7 litre sensitive volume detector in different electric field configurations. This prototype is developed as part of the R&D for the CYGNO project for an application to direct Dark Matter search by detection of tracks of nuclear recoils in the gas within the keV energy range.
Electron and ion transmission of the gating foil for the TPC in the ILC experiment
Authors: Kobayashi M , Ogawa T , Shoji A , Aoki Y , Ikematsu K , Gros P , Kawaguchi T , Arai D , Iwamura M , Katsuki K , Koto A , Yoshikai M , Fujii K , Fusayasu T , Kato Y , Kawada S , Matsuda T , Narita S , Negishi K , Qi H , Settles R D , Sugiyama A , Takahashi T , Tian J , Watanabe T , Yonamine R 
Published: June 2020

Abstract
We have developed a gating foil for the time projection chamber envisaged as a central tracker for the international linear collider experiment. It has a structure similar to the Gas Electron Multiplier (GEM) with a higher optical aperture ratio and functions as an ion gate without gas amplification. The transmission rate for electrons was measured in a counting mode for a wide range of the voltages applied across the foil using an 55Fe source and a laser in the absence of a magnetic field. The upper limit of the transmission rate for positive ions was estimated to be 3.36 ± 0.05 (stat. only)) × 10−4 from the measured electron transmission at a relatively low reverse bias voltage applied to the foil (ΔV =−15.5 V). The blocking power of the gating foil was confirmed to be high enough to suppress the influence of ion backflow.
CMS phase-II upgrade with GEM detector
Authors: Gola Mohit 
Published: June 2020

Abstract
The Large Hadron Collider (LHC) will be upgraded in several phases that will allow significant expansion of its physics program. The final luminosity of the accelerator is expected to exceed 5 × 1034cm−2s−1, five times more than the original design value. The CMS muon system must be able to sustain a physics program after the increase of luminosity and maintain sensitivity for electroweak physics for TeV scale searches similar to what was achieved up to now. To cope with the corresponding increase in background rates and trigger requirements, the installation of additional sets of muon detectors based on Gas Electron Multiplier (GEM) technology, referred to as GE2/1 and ME0, has been planned. The installation and commissioning of the GE2/1 chambers is scheduled in 2022, and for ME0 detectors are expected to be installed between 2022 to 2024. We present an overview of the Muon Spectrometer upgrade using GEM technology, a detailed description of the GE2/1 and ME0 upgrade in terms of design, pre-production chambers, mechanics, installation services etc. We will focus in particular on the novel solutions adopted for realization of the latter project, with a summary of the ongoing R&D activities
Efficiency of rejection of abnormal measurements of the phase difference in the survey location finder when receiving signals of the scanning radio-frequency source under the rough terrain
Authors: Anikin A S , Zakharov F N , Filimonov V A 
Published: June 2020

Abstract
The paper presents the results of a study on rejecting anomalously large direction-finding errors from the results of instantaneous measurements of the ratio of the amplitudes of the output signals of the receiving antennas. Bearing rejection algorithms are based on theoretical dependences obtained for the normal model of fluctuations of the quadrature components of the output signals of the receiving antennas. The efficiency of algorithm rejection is determined by the terrain of open and semi-enclosed routes and may reach 54 percent.
The emergence and evolution of the concept “coherent turbulence”
Authors: Nosov V V , Lukin V P , Nosov E V , Torgaev A V 
Published: June 2020

Abstract
The brief review of the emergence and evolution history of “coherent structure” and “coherent turbulence” concepts in the theory of turbulence is made. The review is based on the data of the world scientific literature and includes some results of the authors’ own long-term research on coherent turbulence.
Optimization of frequency discretization for diagnostic information at diagnostics of technical objects
Authors: Asadchiy A V , Soldatov A I , Soldatov A A , Kim O H 
Published: June 2020

Abstract
The block diagram of the monitoring device is presented. The operation principle of the monitoring device is described. The main units affecting the quality of the monitored signal reconstruction are shown. The analysis of the differentiating device and the voltage-controlled generator is carried out. The main characteristics of the differentiating device and the voltage-controlled oscillator are given and the quality of signal reconstruction is evaluated when their parameters change. The requirements for choosing the optimal value of the derivative time constant and the frequency range of the voltage-controlled generator are specified. A calculation example of the required RAM for recording and reconstruction of the monitored signal is shown.
Investigation of the emit source coordinates estimation accuracy using reflections from the ground clutter
Authors: Dubinin D V , Mescheryakov A A , Denisov V P , Rahimova A M , Bazarbay L A , Geringer V 
Published: June 2020

Abstract
The issues of improving the accuracy of determining the coordinates of a radio source by a single-position method due to the joint processing of multiple signals reflected from local objects are considered. The electronic terrain map was obtained on the basis of artificial images of a two-dimensional point-like reconstruction flow. The results of computer simulation are presented.
Estimation of the relative humidity in the troposphere using GNSS signals
Authors: Zakharov F N , Filimonov V A , Krasnenko N P , Anikin A S 
Published: June 2020

Abstract
The report presents the relative air humidity in the troposphere retrieved from signals of global navigation satellite systems. The estimate is based on information on the moisture retrieved from the value of the wet tropospheric delay. The wet delay is converted into the humidity. The results are compared with the data of direct measurements. The discrepancy between the calculated and measured humidity values is about 12 percent.
Layer-by-layer application of particles using acoustic levitation
Authors: Sukhanov D , Roslyakov S , Emelyanov F 
Published: June 2020

Abstract
A method of layer-by-layer deposition of particles on a flat surface using acoustic levitation in air is proposed. An acoustic field for particle levitation is created using four phased emitter arrays. A field distribution is created that ensures the levitation of particles in a flat layer in a rectangular grid. Using a sound-transparent mesh, particles are fed into the levitation area. The use of an additional focused lattice makes it possible to remove excess particles from the levitation region. Particles are deposited by refocusing the side gratings to a lower height, followed by turning off the field.