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Title: 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 (~10 12 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:
 [1];  [2]; ORCiD logo [3]
  1. The Univ. of Texas at Austin, Austin, TX (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Technion, Haifa (Israel)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (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. doi: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. doi: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 = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 8 works
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Figures / Tables:

FIG. 1 FIG. 1: Electron-H2 cross sections used in 1D PIC/MCC model.

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