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Title: Quantitative study of the trapped particle bunching instability in Langmuir waves

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.
Authors:
;  [1] ; ; ;  [2] ;  [3] ;  [4]
  1. Department of Aerospace Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)
  2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  3. Department of Mathematical Sciences, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
  4. Centre de Recherches en Physique des Plasmas, Association Euratom-Confederation Suisse, Ecole Polytechnique Fédérale de Lausanne, CRPP-PPB, CH-1015 Lausanne (Switzerland)
Publication Date:
OSTI Identifier:
22408057
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; DISPERSION RELATIONS; LANGMUIR FREQUENCY; ONE-DIMENSIONAL CALCULATIONS; TRAPPED-PARTICLE INSTABILITY