Design of Multigap Pseudospark Discharge-Based Plasma Cathode Electron Source at Different Configurations of Electrode Apertures

In this article, design investigations have been performed for wide ranges and sequence of electrode apertures (SEA) like, tapered conical-up or down, irregular/nonuniform and regular/uniform apertures with varying diameters of 2, 4, 6, and 8 mm for 20-60 Pa operating argon gas pressures for the gen...

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Bibliographic Details
Published in:IEEE transactions on electron devices 2021-11, Vol.68 (11), p.5799-5806
Main Authors: Varun, Sharma, Navin Kumar, Pal, Udit Narayan
Format: Article
Language:English
Subjects:
Anode effect
Apertures
Argon
Cathodes
Discharges (electric)
Electric potential
Electrodes
Electron beam
Electron beams
Fault location
hollow cathode (HC)
multigap pseudospark (PS) discharge
Object oriented modeling
Partial discharges
Particle in cell technique
potential distribution
PS discharge
Pseudospark discharge
trigger PS discharge
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Summary:In this article, design investigations have been performed for wide ranges and sequence of electrode apertures (SEA) like, tapered conical-up or down, irregular/nonuniform and regular/uniform apertures with varying diameters of 2, 4, 6, and 8 mm for 20-60 Pa operating argon gas pressures for the generation of electron beam from the multigap pseudospark discharge-based plasma cathode electron (PD-PCE) source using particle-in-cell simulation code. Results show the strong dependence of potential penetration and their distribution on the SEA and gas pressures. The first and last electrodes play significant role for deciding the generation and properties of electron beam current. The SEA and gas pressures influence the rise behavior of electron beam current and voltage fall between the anode and cathode gap. The maximum current of 9.6 kA in uniform electrode aperture sequence while minimum of 513 A in conical down aperture sequence has been observed at the anode. The quenching effect and its reduction during the rise of electron beam current at the anode has also been investigated for different SEA and gas pressures. The proposed analysis would be very much useful for the design and development of multigap PD-PCE sources for high-density and energetic electron beam generation.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2021.3108944