Excitation of a global plasma mode by an intense electron beam in a dc discharge
Abstract
The interaction of an intense electron beam with a finite-length, inhomogeneous plasma is investigated numerically. The plasma density profile is maximal in the middle and decays towards the plasma edges. Two regimes of the two-stream instability are observed. In one regime, the frequency of the instability is the plasma frequency at the density maximum and plasma waves are excited in the middle of the plasma. In the other regime, the frequency of the instability matches the local plasma frequency near the edges of the plasma and the intense plasma oscillations occur near plasma boundaries. The latter regime appears sporadically and only for strong electron beam currents. This instability generates a copious amount of suprathermal electrons. Finally, the energy transfer to suprathermal electrons is the saturation mechanism of the instability.
- Authors:
-
- Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Tokyo Electron America, Inc., Austin, TX (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1433301
- Alternate Identifier(s):
- OSTI ID: 1414608
- Grant/Contract Number:
- AC02-76CH03073
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Sydorenko, D., Kaganovich, I. D., Ventzek, P. L. G., and Chen, L. Excitation of a global plasma mode by an intense electron beam in a dc discharge. United States: N. p., 2018.
Web. doi:10.1063/1.5018427.
Sydorenko, D., Kaganovich, I. D., Ventzek, P. L. G., & Chen, L. Excitation of a global plasma mode by an intense electron beam in a dc discharge. United States. https://doi.org/10.1063/1.5018427
Sydorenko, D., Kaganovich, I. D., Ventzek, P. L. G., and Chen, L. 2018.
"Excitation of a global plasma mode by an intense electron beam in a dc discharge". United States. https://doi.org/10.1063/1.5018427. https://www.osti.gov/servlets/purl/1433301.
@article{osti_1433301,
title = {Excitation of a global plasma mode by an intense electron beam in a dc discharge},
author = {Sydorenko, D. and Kaganovich, I. D. and Ventzek, P. L. G. and Chen, L.},
abstractNote = {The interaction of an intense electron beam with a finite-length, inhomogeneous plasma is investigated numerically. The plasma density profile is maximal in the middle and decays towards the plasma edges. Two regimes of the two-stream instability are observed. In one regime, the frequency of the instability is the plasma frequency at the density maximum and plasma waves are excited in the middle of the plasma. In the other regime, the frequency of the instability matches the local plasma frequency near the edges of the plasma and the intense plasma oscillations occur near plasma boundaries. The latter regime appears sporadically and only for strong electron beam currents. This instability generates a copious amount of suprathermal electrons. Finally, the energy transfer to suprathermal electrons is the saturation mechanism of the instability.},
doi = {10.1063/1.5018427},
url = {https://www.osti.gov/biblio/1433301},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 1,
volume = 25,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2018},
month = {Mon Jan 01 00:00:00 EST 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
Beam-assisted extraction of charged particles from a decaying plasma
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Figures / Tables found in this record: