NDLI: Analysis of electron beam in pseudospark discharge based hollow cathode electron gun

Content Provider	IEEE Xplore Digital Library
Author	Verma, D. K. Lamba, V. Kumar, N. Kumar, M. Meena, B. L. Tyagi, M. S. Srivastava, V. Pal, U. N.
Copyright Year	2011
Description	Author affiliation: Microwave Tubes Area, Central Electronics Engineering, Research Institute (CEERI)/Council of Scientific and Industrial Research (CSIR), Pilani, Rajasthan-333031, India (Verma, D. K.; Lamba, V.; Kumar, N.; Kumar, M.; Meena, B. L.; Tyagi, M. S.; Srivastava, V.; Pal, U. N.)
Abstract	The high-power microwave devices filled with plasma have unique properties [1]. The problems caused by drifting of ions from the plasma toward the gun regions of the tube can be mitigated by replacing the material cathode with plasma cathode [2]. A pseudospark discharge is a viable possibility in this respect, due to the emitted linear beam's characteristic properties such as, high current density and high brightness as well as self-focusing during its propagation [3]. It is an axially symmetric, selfsustained, transient, low pressure (typically 50–500 mTorr) gas discharge and takes place in special hollow-electrode geometry of a hollow cathode/planar anode configuration in various gases such as nitrogen, argon, hydrogen and xenon. It operates on the left-hand side (with respect to the minimum) of the hollow cathode analogy to the Paschen curve. An experimental investigation has been conducted for a single gap Pseudospark based plasma gun in H atmosphere at different operating conditions. The analysis of beam current, discharge current, and collector current has been carried out with respect to different applied voltages and gas pressures. The voltage breakdown characteristics have also been studied against variation in gas pressure keeping the gap fixed. The produced pulsed electron beams have current density more than 700 $Acm^{−2}$ for beam current measured up to 100 amps. The electron beam is travelling more than 120 mm in the drift region through gaseous environment without using guiding magnetic field, which confirms that the beam transport of electron beam was based on the neutralization of the space charge of the electron beam due to ionization of the gas molecules by the beam itself. The above phenomena have also been confirmed by object oriented particle in cell code.
Starting Page	1
Ending Page	1
File Size	53369
Page Count	1
File Format	PDF
ISBN	9781612843308
ISSN	07309244
e-ISBN	9781612843292
e-ISBN	9781612843285
DOI	10.1109/PLASMA.2011.5993168
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Discharges Cathodes Electron beams
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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