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. (C) 2015 AIP Publishing LLC.


Published in:
Physics Of Plasmas, 22, 2
Year:
2015
Publisher:
Melville, Amer Inst Physics
ISSN:
1070-664X
Laboratories:
SPC
CRPP




 Record created 2015-04-13, last modified 2018-09-13


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