Journal ArticleDOI
Effect of Tapered Interelectrode Gap Region on Pseudospark-Sourced Electron Beam Emission
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TLDR
In this article, a comparative experimental and simulations analysis has been carried out to understand the role of tapered gap region on current density and energy of pseudospark (PS)-based electron beam emission.Abstract:
In this article, a comparative experimental and simulations analysis has been carried out to understand the role of tapered gap region on current density and energy of pseudospark (PS)-based electron beam emission. These studies have been performed for 5-gap and 8-gap regions in a tapered multigap multiaperture-based PS electron beam source, keeping the same electron beam fill factor, and other geometrical parameters identical. The source has been operated in a self-breakdown mode. Around four-times increase in the beam current has been observed in the 8-gap case at the fixed applied gap potential ranging between 20 and 25 kV, whereas the tapered interelectrode gap angle has been reduced from 7.5° to 4.5°. The field penetration inside the hollow cathode cavity and tapered region have also been analyzed using simulations, and the obtained results are explained based on built-up space charge in these regions.read more
Citations
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Journal ArticleDOI
Investigations on High-Current-Density Sheet-Beam Driven V-Band Slow Wave Oscillator With a Hollow Cathode
Roman A. Torgashov,V.N. Titov,Vishant,Niraj Kumar,Anand Abhishek,Nikita Gurjar,Kushagra Singhal,S. Jain,R. K. Sharma,Nikita M. Ryskin +9 more
TL;DR: In this paper, the design approach for a miniaturized oscillator with a pseudospark-based high-current-density sheet electron beam source is presented and the hollow cathode electron gun has been designed and developed.
Journal ArticleDOI
Implementation of Trigger Unit for Generation of High-Current-Density Electron Beam
TL;DR: In this article, a trigger unit has been implemented to generate a high-current-density electron beam from a pseudospark (PS) discharge-based electron gun, and a comparative analysis has also been performed between self-breakdown and trigger breakdown modes with the developed trigger unit's help for different applied gap voltages ranging between 0 and 16 kV.
Journal ArticleDOI
Analysis of Hollow Cathode Aperture Wall Profile on Pseudospark Discharge-Based Sheet Electron Beam Source
Kushagra Singhal,Nikita Gurjar,Sahil Jain,Vishant,Anand Abhishek,Andrey V. Starodubov,Nikita M. Ryskin,Niraj Kumar +7 more
TL;DR: In this paper, the role of hollow cathode aperture wall profile on pseudospark discharge-based single gap sheet electron beam source has been analyzed using COMSOL multiphysics, and a good correlation has been obtained between simulation and experimental studies.
Journal ArticleDOI
Novel Linear Graded Binary Metal Alloy P α Q 1-α Gate Electrode and Middle N+ Pocket Si 0.5 Ge 0.5 Vertical TFET for High Performance
Jeetendra Singh,Girish Wadhawa +1 more
TL;DR: This device with a lower SS improves the transistor’s switching and encourages its applicability in high-speed circuits and offers steep sub-threshold Slope (SS).
Journal ArticleDOI
Design and optimization of junctionless-based devices with noise reduction for ultra-high frequency applications
TL;DR: In this paper, the authors examined the noise performance of four devices namely junctionless dual-gate FET (JL-DGFET), junctionless nanowire FET, junctionless NN-NWFET and charge-plasma based dopingless DGFET.
References
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Journal ArticleDOI
Plasma physics and related challenges of millimeter-wave-to-terahertz and high power microwave generationa)
TL;DR: In this article, the contemporary plasma physics and other related issues of compact, high power mmw-to-THz sources are compared and contrasted to those of classic HPM generation, and future research challenges and opportunities are discussed.
Journal ArticleDOI
Stability and confinement of nonrelativistic sheet electron beams with periodic cusped magnetic focusing
TL;DR: In this article, two rectangular cross-section magnetic configurations capable of focusing in both transverse dimensions are investigated: (i) a closed-side two-plane PCM configuration that is topologically equivalent to conventional round-cross-section PPM focusing; and (ii) an open-side configuration that uses ponderomotive PCM focusing in the vertical plane and simple vzBy Lorentz force focusing in horizontal plane.
Journal ArticleDOI
Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam
TL;DR: In this article, a pseudospark (PS) electron beam was generated for a high frequency (0.2 THz) Backward Wave Oscillator (BOWO) through a Doppler up-shift of the plasma frequency.
Journal ArticleDOI
Simulation and Experiments of a $W$ -Band Extended Interaction Oscillator Based on a Pseudospark-Sourced Electron Beam
TL;DR: In this article, the authors presented the first experimental results of an extended interaction oscillator (EIO) based on a pseudospark-sourced electron beam, which produced a peak output power over 38 W at $W$ -band.
Journal ArticleDOI
Pseudospark switches-technological aspects and application
R. Tkotz,A. Gortler,Jens Christiansen,S. Dollinger,Klaus Frank,F. Heine,U. Herleb,S. Insam,R. Kowalewicz,T. Mehr,A. Poister,U. Prucker,M. Schlaug,A. Schwandner +13 more
TL;DR: In this article, the pseudospark switches were developed at Erlangen University for pulsed gas discharge laser and high power switches (30 kV anode voltage, 400 kA anode current and 3.4 C charge transfer per shot) for high current applications.