Quantitative study of the trapped particle bunching instability in Langmuir waves

Hara, Kentaro; Chapman, Thomas; Banks, Jeffrey W.; Brunner, Stephan; Joseph, Ilon; Berger, Richard L.; Boyd, Iain D.

doi:10.1063/1.4906884

Quantitative study of the trapped particle bunching instability in Langmuir waves

Journal Article · Mon Feb 02 23:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4906884· OSTI ID:1880964

^[1]; Chapman, Thomas ^[2]; Banks, Jeffrey W. ^[3]; Brunner, Stephan ^[4]; Joseph, Ilon ^[2]; Berger, Richard L. ^[2]; Boyd, Iain D. ^[1]

Univ. of Michigan, Ann Arbor, MI (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Rensselaer Polytechnic Inst., Troy, NY (United States)
Ecole Polytechnique Federale Lausanne (EPFL Switzerland)

Here, the bunching instability of particles trapped in Langmuir waves is studied using Vlasov simulations. A measure of particle bunching is defined and used to extract the growth rate from numerical simulations, which are compared with theory [Dodin et al., Phys. Rev. Lett. 110, 215006 (2013)]. In addition, the general theory of trapped particle instability in 1D is revisited and a more accurate description of the dispersion relation is obtained. Excellent agreement between numerical and theoretical predictions of growth rates of the bunching instability is shown over a range of parameters.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1880964

Alternate ID(s):: OSTI ID: 1228510
OSTI ID: 22408057

Report Number(s):: LLNL-JRNL-660076; 780400

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 22; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Quantitative study of the trapped particle bunching instability in Langmuir waves

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