NDLI: Development of a high current pseudospark switch and measurement of electron density

Content Provider	IEEE Xplore Digital Library
Author	Gortler, A. Schwandner, A. Christiansen, J. Frank, K. Granzer, H.
Copyright Year	1973
Abstract	The pseudospark, a low-pressure gas discharge in a special geometry, is suitable for high-current switching. A single-channel prototype is tested with a 3.3- mu F capacitor bank, voltages up to 30 kV, and peak currents up to 120 kA. The electrical circuit, not comprising any load resistor causes weakly damped sinusoidal pulses of 5- mu s duration at 90% current reversal. For lifetime tests, a switch with an alumina insulator and copper seals is used. Hydrogen is the working gas. Several electrode materials like molybdenum, tungsten, graphite and chromium-copper are tested. Optical investigations of the discharge and of plasma parameters are done with an O-ring sealed pseudospark switch. The light of the discharge is observed spectrally integrated with a streak camera. Spectral resolution is obtained by using a high-speed shutter in combination with a monochromator. The radial electron density is determined by measuring the Stark broadening of the Balmer H/sub beta /-line. At 60 kA a maximum electron density of about 2*10/sup 17/cm/sup -3/ is calculated.<>
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	516
Ending Page	521
Page Count	6
File Size	589913
File Format	PDF
ISSN	00933813
Volume Number	21
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Circuit testing Optical switches Plasma measurements Electrons Discharges Geometry Prototypes Capacitors Voltage
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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