Particle-in-cell modeling of the nanosecond field emission driven discharge in pressurized hydrogen
Abstract
The high-voltage field-emission driven nanosecond discharge in pressurized hydrogen is studied using the one-dimensional Particle-in-Cell Monte Carlo collision model. It is obtained that the main part of the field-emitted electrons becomes runaway in the thin cathode sheath. These runaway electrons propagate the entire cathode-anode gap, creating rather dense (~1012 cm–3) seeding plasma electrons. In addition, these electrons initiate a streamer propagating through this background plasma with a speed ~30% of the speed of light. Such a high streamer speed allows the self-acceleration mechanism of runaway electrons present between the streamer head and the anode to be realized. As a consequence, the energy of runaway electrons exceeds the cathode-anode gap voltage. In conclusion, the influence of the field emission switching-off time is analyzed. It is obtained that this time significantly influences the discharge dynamics.
- Authors:
-
- The Univ. of Texas at Austin, Austin, TX (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Technion, Haifa (Israel)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1472064
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 8; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Levko, Dmitry, Yatom, Shurik, and Krasik, Yakov E. Particle-in-cell modeling of the nanosecond field emission driven discharge in pressurized hydrogen. United States: N. p., 2018.
Web. doi:10.1063/1.5021129.
Levko, Dmitry, Yatom, Shurik, & Krasik, Yakov E. Particle-in-cell modeling of the nanosecond field emission driven discharge in pressurized hydrogen. United States. https://doi.org/10.1063/1.5021129
Levko, Dmitry, Yatom, Shurik, and Krasik, Yakov E. Tue .
"Particle-in-cell modeling of the nanosecond field emission driven discharge in pressurized hydrogen". United States. https://doi.org/10.1063/1.5021129. https://www.osti.gov/servlets/purl/1472064.
@article{osti_1472064,
title = {Particle-in-cell modeling of the nanosecond field emission driven discharge in pressurized hydrogen},
author = {Levko, Dmitry and Yatom, Shurik and Krasik, Yakov E.},
abstractNote = {The high-voltage field-emission driven nanosecond discharge in pressurized hydrogen is studied using the one-dimensional Particle-in-Cell Monte Carlo collision model. It is obtained that the main part of the field-emitted electrons becomes runaway in the thin cathode sheath. These runaway electrons propagate the entire cathode-anode gap, creating rather dense (~1012 cm–3) seeding plasma electrons. In addition, these electrons initiate a streamer propagating through this background plasma with a speed ~30% of the speed of light. Such a high streamer speed allows the self-acceleration mechanism of runaway electrons present between the streamer head and the anode to be realized. As a consequence, the energy of runaway electrons exceeds the cathode-anode gap voltage. In conclusion, the influence of the field emission switching-off time is analyzed. It is obtained that this time significantly influences the discharge dynamics.},
doi = {10.1063/1.5021129},
journal = {Journal of Applied Physics},
number = 8,
volume = 123,
place = {United States},
year = {Tue Feb 27 00:00:00 EST 2018},
month = {Tue Feb 27 00:00:00 EST 2018}
}
Web of Science
Figures / Tables:
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Figures / Tables found in this record: