Generalized slab universal instability and its appearance in pair plasma

Zhu, Ben; Francisquez, Manaure; Rogers, Barrett N.; Xu, Xue-qiao

doi:10.1063/5.0015209

Title: Generalized slab universal instability and its appearance in pair plasma

Journal Article · Thu Oct 01 00:00:00 EDT 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0015209· OSTI ID:1708989

^[1];

^[2]; Rogers, Barrett N. ^[3];

^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Dartmouth College, Hanover, NH (United States)

In this work, a generalized linear dispersion relation of electromagnetic slab universal modes is derived, taking into account arbitrary ion charge state, electron finite Larmor radius (FLR) effects, and Debye shielding effects. As a consequence, it provides more accurate predictions and is applicable to a wider range of plasmas. We find that electron FLR effects have a weakly stabilizing effect on the slab universal instability in electron–ion plasma, while Debye shielding strongly stabilizes this instability when λ_D approaches ρ_i (λ_D is the Debye length and ρi is the ion gyroradius). In particular, we examine the stability criterion for this instability in electron–positron pair plasmas and find that the instability persists in this simplest plasma system as long as the pair plasma number density exceeds the critical value n_c = B²/(8πm_ec²).

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; FC02-08ER54966; SC0010508

OSTI ID:: 1708989

Alternate ID(s):: OSTI ID: 1669181

Report Number(s):: LLNL-JRNL-810427; 1017130; TRN: US2204637

Journal Information:: Physics of Plasmas, Vol. 27, Issue 10; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Generalized slab universal instability and its appearance in pair plasma

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