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Diffuse discharge produced by repetitive nanosecond pulses in open air, nitrogen, and helium
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10.1063/1.4794031
/content/aip/journal/jap/113/9/10.1063/1.4794031
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/9/10.1063/1.4794031
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the experimental setup and measurement (generator #1).

Image of FIG. 2.
FIG. 2.

Schematic diagram of the discharge chamber for generators #3 and #4: (1) housing of the collector, (2) gas inlet and exhaust pipes, (3) collector, (4) high voltage electrode, (5) capacitive voltage divider, (6) shunt, (7) connection of high voltage cable, (8) anode grid, (9) metal ring of 2 mm thickness, and (10) shield grid.

Image of FIG. 3.
FIG. 3.

Discharge images at different gaps, (a) no discharge, (b) and (c) spark or arc, (d) diffuse discharge, (f) and (e) corona (generator #1, applied voltage: −120 kV and PRF: 1000 Hz).

Image of FIG. 4.
FIG. 4.

Voltage-current waveforms at different gaps (generator #1, applied voltage: 120 kV and PRF: 1000 Hz).

Image of FIG. 5.
FIG. 5.

Discharge images at different PRFs, (a) 100 Hz, (b) 250 Hz, (c) 500 Hz, and (d) 1000 Hz (generator #1, applied voltage: 120 kV and gap spacing: 8 cm).

Image of FIG. 6.
FIG. 6.

Voltage-current waveforms at different PRFs (generator #1, applied voltage: −120 kV and gap spacing: 8 cm).

Image of FIG. 7.
FIG. 7.

Discharge images at different applied voltages, (a) no discharge, (b) 70 kV, (c) 90 kV, and (d) 120 kV (generator #1, PRF: 1000 Hz and gap spacing: 8 cm).

Image of FIG. 8.
FIG. 8.

Voltage-current waveforms at different applied voltages (generator #1, PRF: 1000 Hz and gap spacing: 8 cm).

Image of FIG. 9.
FIG. 9.

Discharge images at different gap spacings, (a) no discharge, (b) corona, (c) diffuse discharge, and (d) spark or arc (generator #2, applied voltage: 45 kV and PRF: 500 Hz).

Image of FIG. 10.
FIG. 10.

Voltage-current waveforms at different gaps (generator #2, applied voltage: 45 kV and PRF: 500 Hz).

Image of FIG. 11.
FIG. 11.

Dependence of X-ray counts on air gap spacing at different voltages (generator #1, PRF: 1 kHz).

Image of FIG. 12.
FIG. 12.

Waveforms of voltage pulses (a) and current of runaway electron beam (b) behind foil at pulse frequency of 200 Hz under helium pressure of 320 Torr. Gap spacing: 10 mm. Generator #3.

Image of FIG. 13.
FIG. 13.

Waveforms of voltage pulses (a) and current of runaway electron beam (b) behind foil at pulse frequency of 1 kHz in helium with pressure of 2 Torr. Gap spacing: 5 mm. Generator #4.

Image of FIG. 14.
FIG. 14.

Discharge images taken by a CCD-camera (HSFC-Pro) after applied voltage at the first nanosecond (a), at 7-10 ns (b), at 13-16 ns (c), and at 19-21 ns (d). Generator #4. Gap spacing was 4 mm, and the cathode was on the top.

Image of FIG. 15.
FIG. 15.

Discharge images for one pulse through the flat electrode from grid in helium with spacing of gap 5 mm (a) and in air with gap spacing of 2 mm at atmospheric pressure, and flare spot under x-rays from discharges during one hour on the Kodak RAR film 2497 in helium (b) and in air (d). Generator #4, positive polarity, PRF: 1 kHz.

Image of FIG. 16.
FIG. 16.

Dependence of the reflected voltage pulse amplitude (a) and number of fast electrons versus helium pressure at interelectrode distances of 10 mm. Measurements were made without metallized film at negative voltage pulse applied to the gap.

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/content/aip/journal/jap/113/9/10.1063/1.4794031
2013-03-01
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Diffuse discharge produced by repetitive nanosecond pulses in open air, nitrogen, and helium
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/9/10.1063/1.4794031
10.1063/1.4794031
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