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论文类型：期刊论文

发表时间：2012-01-09

发表刊物：PHYSICS LETTERS A

收录刊物：SCIE

卷号：376

期号：4

页面范围：505-509

ISSN号：0375-9601

关键字：Double tearing mode; Plasma rotation; Compressibility

摘要：Effects of compressibility on the double tearing modes (DIMS) in rotating plasmas are numerically investigated by using a compressible magnetohydrodynamics (MHD) model. It is found that due to the compressibility effects, the threshold of the interlocking magnetic island width in the slow and intermediate rotation regimes is larger than the counterpart in the incompressible plasmas. In the fast rotation regime, the compressible effect makes the DIM islands interlock more easily and faster. Moreover, in the very fast rotation regime, the plasma rotation can more effectively suppress the DIM islands. The scalings of the interlocking threshold in the different rotation regimes are obtained. Effects of plasma viscosity and beta on the DIM interlocking in the compressible plasmas are also discussed. (C) 2011 Elsevier B.V. All rights reserved.