文献类型：期刊文献

英文题名：The dynamics of an ion acting on two monochromatic obliquely propagating Alfven waves

作者：Yu, Limin[1];Sheng, Zhengmao[2,3];Zhang, Xianmei[1];Xue, Erbing[1]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China;[3]Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Zhejiang, Peoples R China

年份：2017

卷号：19

期号：7

外文期刊名：PLASMA SCIENCE & TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000403264000003)】；

基金：Yu L acknowledges useful discussions with Zhichen Feng about the Lie transformation method. This work was supported by National Natural Science Foundation of China under Grant Nos. 11075140, 11205060 and 11405058 and the National Magnetic Confinement Fusion Science Program of China under Grant Nos. 2013GB106002 and 2015GB110005.

语种：英文

外文关键词：Alfven waves; Lie transformation; Poincare section; stochastic heating

摘要：The interaction between a magnetized ion and two monochromatic shear Alfven waves propagating obliquely to an ambient magnetic field is investigated both analytically and numerically. According to the Hamiltonian of this system, the invariant of motion at the lowest order and the half-island widths at the corresponding resonances are obtained analytically using the Lie transformation method. It is shown that these theoretical results agree with the numerical ones from the Poincare surface of section. The regular motions from the invariant and the transition to stochasticity due to resonance overlapping are demonstrated. Compared to the case of a single wave, there may be a lower stochastic threshold in the multiple-wave problem.