Development of a high current pseudospark switch and measurement of electron density
| Autor: | A. Schwandner, A. Gortler, Klaus Frank, H. Granzer, Jens Christiansen |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Nuclear and High Energy Physics
Electron density Materials science Plasma parameters Streak camera business.industry Electrical engineering Insulator (electricity) Condensed Matter Physics Electric discharge in gases symbols.namesake Stark effect symbols Optoelectronics Pseudospark switch Plasma diagnostics business |
| Zdroj: | IEEE Transactions on Plasma Science. 21:516-521 |
| ISSN: | 0093-3813 |
| DOI: | 10.1109/27.249637 |
| Popis: | 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. > |
| Databáze: | OpenAIRE |
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