Space- and time-resolved characterization of nanosecond time scale discharge at pressurized gas

S. Yatom; V. Vekselman; J. Z. Gleizer; Ya E. Krasik

doi:10.1063/1.3573507

Space- and time-resolved characterization of nanosecond time scale discharge at pressurized gas

S. Yatom, V. Vekselman, J. Z. Gleizer, Ya E. Krasik

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Abstract

The phenomenon of ultra-fast electrical gas breakdown was investigated. Nanosecond high-voltage pulses with durations of 1 and 5 ns and amplitudes of 100 and 200 kV, respectively, were used to study the parameters of the discharge in a pressured (1-7) × 10⁵ Pa air-filled gap. The development of the discharge and the plasma propagation velocity was examined using optical fast frame imaging. The generation of runaway electrons in the breakdown process was confirmed by electron imaging and time-resolved x-ray diagnostics. Runaway electron beam energy distribution was obtained for a 1 ns duration high-voltage pulse. The origin and the role of runaway electrons in the discharge initiation are also discussed.

Original language	English (US)
Article number	073312
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.1063/1.3573507
State	Published - Apr 1 2011
Externally published	Yes

Bibliographical note

Funding Information:
The authors are grateful to V. Tz. Gurovich and D. Levko for fruitful discussions, and to S. Rukin and K. Gruzinsky for assistance in high-voltage generator development. This research was supported by the Technion Grant No. 2013371 and the Center of Absorption in Science, Ministry of Immigrant Absorption, State of Israel.

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abstract = "The phenomenon of ultra-fast electrical gas breakdown was investigated. Nanosecond high-voltage pulses with durations of 1 and 5 ns and amplitudes of 100 and 200 kV, respectively, were used to study the parameters of the discharge in a pressured (1-7) × 105 Pa air-filled gap. The development of the discharge and the plasma propagation velocity was examined using optical fast frame imaging. The generation of runaway electrons in the breakdown process was confirmed by electron imaging and time-resolved x-ray diagnostics. Runaway electron beam energy distribution was obtained for a 1 ns duration high-voltage pulse. The origin and the role of runaway electrons in the discharge initiation are also discussed.",

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AU - Krasik, Ya E.

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Space- and time-resolved characterization of nanosecond time scale discharge at pressurized gas

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