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论文类型：期刊论文

发表时间：2016-02-01

发表刊物：PHYSICS OF PLASMAS

收录刊物：SCIE、EI

卷号：23

期号：2

ISSN号：1070-664X

摘要：The transport of intense ion beams with sharp radial beam edge in plasmas has been studied with two-dimensional electromagnetic particle simulations. The initial solid beam evolves into a hollow beam due to the nonlinear sharp transverse force peak in the regions of beam edge. The magnitude and nonlinearity of this peak are enhanced as the ion beam travels further into the plasma, due to the self-consistent interactions between the beam ions and the plasma electrons. This structure formation is shown to be independent on the beam radius. (C) 2016 AIP Publishing LLC.