Strongly Emitting Surfaces Unable to Float below Plasma Potential
Abstract
One important unresolved question in plasma physics concerns the effect of strong electron emission on plasma-surface interactions. Previous papers reported solutions with negative and positive floating potentials relative to the plasma edge. For these two models a very different predictions for particle and energy balance is given. Here we show that the positive potential state is the only possible equilibrium in general. Even if a negative floating potential existed at t=0, the ionization collisions near the surface will force a transition to the positive floating potential state. Moreover, this transition is demonstrated with a new simulation code.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1258533
- Alternate Identifier(s):
- OSTI ID: 1239451
- Report Number(s):
- LLNL-JRNL-680138
Journal ID: ISSN 0031-9007; PRLTAO
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 116; Journal Issue: 8; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION
Citation Formats
Campanell, M. D., and Umansky, M. V. Strongly Emitting Surfaces Unable to Float below Plasma Potential. United States: N. p., 2016.
Web. doi:10.1103/PhysRevLett.116.085003.
Campanell, M. D., & Umansky, M. V. Strongly Emitting Surfaces Unable to Float below Plasma Potential. United States. https://doi.org/10.1103/PhysRevLett.116.085003
Campanell, M. D., and Umansky, M. V. Thu .
"Strongly Emitting Surfaces Unable to Float below Plasma Potential". United States. https://doi.org/10.1103/PhysRevLett.116.085003. https://www.osti.gov/servlets/purl/1258533.
@article{osti_1258533,
title = {Strongly Emitting Surfaces Unable to Float below Plasma Potential},
author = {Campanell, M. D. and Umansky, M. V.},
abstractNote = {One important unresolved question in plasma physics concerns the effect of strong electron emission on plasma-surface interactions. Previous papers reported solutions with negative and positive floating potentials relative to the plasma edge. For these two models a very different predictions for particle and energy balance is given. Here we show that the positive potential state is the only possible equilibrium in general. Even if a negative floating potential existed at t=0, the ionization collisions near the surface will force a transition to the positive floating potential state. Moreover, this transition is demonstrated with a new simulation code.},
doi = {10.1103/PhysRevLett.116.085003},
journal = {Physical Review Letters},
number = 8,
volume = 116,
place = {United States},
year = {Thu Feb 25 00:00:00 EST 2016},
month = {Thu Feb 25 00:00:00 EST 2016}
}
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