外文题目: The charge imbalance in ultracold plasmas
作者: Chen, Tianxing; Lu, Ronghua; Guo, Li; Han, Shensheng
刊名: Phys. Plasmas
年: 2016 卷: 23 期: 9 文章编号：92102
英文关键词:

NEUTRAL PLASMA; EXPANSION; VACUUM
英文摘要:
Ultracold plasmas are regarded as quasineutral but not strictly neutral. The results of charge imbalance in the expansion of ultracold plasmas are reported. The calculations are performed by a full molecular-dynamics simulation. The details of the electron velocity distributions are calculated without the assumption of electron global thermal equilibrium and Boltzmann distribution. Spontaneous evolutions of the charge imbalance from the initial states with perfect neutrality are given in the simulations. The expansion of outer plasma slows down with the charge imbalance. The influences of plasma size and parameters on the charge imbalance are discussed. The radial profiles of electron temperature are given for the first time, and the self-similar expansion can still occur even if there is no global thermal equilibrium. The electron disorder induced heating is also found in the simulation. Published by AIP Publishing.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1063/1.4961957


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