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Author Chen, Tianxing ♦ Lu, Ronghua ♦ Guo, Li ♦ Han, Shensheng
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ BOLTZMANN STATISTICS ♦ COMPUTERIZED SIMULATION ♦ DISTRIBUTION ♦ ELECTRON TEMPERATURE ♦ ELECTRONS ♦ HEATING ♦ MOLECULAR DYNAMICS METHOD ♦ PLASMA ♦ THERMAL EQUILIBRIUM ♦ VELOCITY
Abstract 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.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-09-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 23
Issue Number 9


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