High current glow discharge switch with remarkable cathode properties

The authors report on the development of a novel high-power switch with an extremely high (>10 kA/cm/sup 2/ over an area approximately=1 cm/sup 2/) cathode emission current density. The high cathode emission allows the switch to conduct peak currents in excess of 10-20 kA in a diffuse glow discha...

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Main Authors: Kirkman, G., Hartmann, W., Hsu, T.Y., Liou, R.L., Gundersen, M.A.
Format: Conference Proceeding
Language:English
Subjects:
Cathodes
Current density
Delay
Electrodes
Glow discharges
Jitter
Optical pulses
Switches
Thyratrons
Voltage
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creator Kirkman, G.
Hartmann, W.
Hsu, T.Y.
Liou, R.L.
Gundersen, M.A.
description The authors report on the development of a novel high-power switch with an extremely high (>10 kA/cm/sup 2/ over an area approximately=1 cm/sup 2/) cathode emission current density. The high cathode emission allows the switch to conduct peak currents in excess of 10-20 kA in a diffuse glow discharge without severely damaging the electrodes. The switch is triggered by an unfocused ultraviolet light pulse from a flashlamp or laser incident on the back of the cathode and is referred to as back-lighted thyratron (BLT). Typical operating parameters are >25 kV holdoff voltage, >10 kA peak current, approximately 3*10/sup 11/ A/s dI/dt, and delay and triggering jitter of the order of 100 ns and 1 ns, respectively. The cathode emission is extremely high and results from self-heating caused by a transient ion beam during the switch-closure phase.< >
doi_str_mv 10.1109/IEDM.1988.32872
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identifier ISSN: 0163-1918
ispartof Technical Digest., International Electron Devices Meeting, 1988, p.534-537
issn 0163-1918
2156-017X
language eng
recordid cdi_ieee_primary_32872
source IEEE Xplore All Conference Series
subjects Cathodes
Current density
Delay
Electrodes
Glow discharges
Jitter
Optical pulses
Switches
Thyratrons
Voltage
title High current glow discharge switch with remarkable cathode properties
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