Breaking of a Langmuir wave in cold electron–positron–ion plasmas

Suyun ZHOU (周素云); Hui CHEN (陈辉); Yanfang LI (李艳芳)

doi:10.1088/2058-6272/aa8cc0

Plasma Science and Technology > 2018 > 20(1): 14008-014008. > DOI: 10.1088/2058-6272/aa8cc0

Suyun ZHOU (周素云), Hui CHEN (陈辉), Yanfang LI (李艳芳). Breaking of a Langmuir wave in cold electron–positron–ion plasmas[J]. Plasma Science and Technology, 2018, 20(1): 14008-014008. DOI: 10.1088/2058-6272/aa8cc0

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Breaking of a Langmuir wave in cold electron–positron–ion plasmas

¹ School of Material and Electromechanical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, People’s Republic of China
² Department of Physics, Nanchang University, Nanchang 330047, People’s Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Nos. 11665012 and 11247016) and the Natural Science Foundation of Jiangxi Province, China (Nos. 2014ZBAB202001 and 2015ZBAB202006).

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Abstract

Abstract

The space–time evolution of a given density perturbation in cold homogeneous electron–positron–ion plasma is investigated with an assumption of infinitely massive ions by employing a numerical calculation method. The phase-mixing time and wave-breaking time can be effectively distinguished with this method. It is found that an increase of the ratio of equilibrium ion density to equilibrium electron density can attenuate plasma oscillations, leading to a delay in wave breaking. The dependence of the phase-mixing and wave-breaking times on the amplitude of the initial perturbation is also discussed.
- e–p–i plasma,
- phase-mixing time,
- wave-breaking time

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