Effect of Doppler-shifted photons on subnanosecond breakdown in high-voltage pulse discharge
- Institute of Theoretical and Applied Mechanics, Novosibirsk 630090 (Russian Federation)
- A.V. Rzhanov Institute of Semiconductor Physics, Novosibirsk 630090 (Russian Federation)
The experiments in high-voltage open discharge in helium [1, 2] showed a controlled current growth rate of 500 A/(cm{sup 2}ns) for an applied voltage of 20 kV and gas pressure of 6 Torr. A kinetic model of the subnanosecond breakdown is developed to analyze the mechanism of current growth, which takes into account the kinetics of electrons, ions, fast atoms and photons with a Doppler shift (DS). DS photons appear in discharge due to collisions of heavy particles. Using particle in cell simulations, we show a critical role of DS photons in the electron emission from the cathode during the breakdown. Our experimental and calculation results show a decrease of the breakdown time with increasing gas pressure from 3 Torr to 16 Torr.
- OSTI ID:
- 22608945
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1738; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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