Strongly Emitting Surfaces Unable to Float below Plasma Potential

Campanell, M. D.; Umansky, M. V.

doi:10.1103/PhysRevLett.116.085003

Title: Strongly Emitting Surfaces Unable to Float below Plasma Potential

Journal Article · Thu Feb 25 00:00:00 EST 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.116.085003· OSTI ID:1258533

Campanell, M. D. ^[1]; Umansky, M. V. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1258533

Alternate ID(s):: OSTI ID: 1239451

Report Number(s):: LLNL-JRNL-680138; PRLTAO

Journal Information:: Physical Review Letters, Vol. 116, Issue 8; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 72 works

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