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Title: Strongly Emitting Surfaces Unable to Float below Plasma Potential

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:
 [1] ;  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-680138
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:
AC52-07NA27344
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)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION
OSTI Identifier:
1258533
Alternate Identifier(s):
OSTI ID: 1239451

Campanell, M. D., and Umansky, M. V.. Strongly Emitting Surfaces Unable to Float below Plasma Potential. United States: N. p., Web. doi:10.1103/PhysRevLett.116.085003.
Campanell, M. D., & Umansky, M. V.. Strongly Emitting Surfaces Unable to Float below Plasma Potential. United States. doi:10.1103/PhysRevLett.116.085003.
Campanell, M. D., and Umansky, M. V.. 2016. "Strongly Emitting Surfaces Unable to Float below Plasma Potential". United States. doi: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 = {2016},
month = {2}
}