The maximum energy of 3He ions accelerated by current-driven instabilities
The maximum energy of 3He ions accelerated by current-driven instabilities
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DOI：
10.1063/1.1650846
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发表时间：
2004-04
影响因子：
2.2
通讯作者：
M. Toida;H. Okumura
中科院分区：
文献类型：
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作者：
M. Toida;H. Okumura
强电流驱动的不稳定性的非线性发展可以通过频率为ω <$2 Ω 3 He（Ω 3 He是3 He的回旋频率）的H回旋波对3 He离子进行选择性加速。对这些离子的能量进行了理论和数值研究。本文给出了ω = 2Ω ~ 3 He的H回旋波的波数k_（？）和k_（？）以及~ 3 He离子的最大能量的理论表达式。随着初始电子漂移速度vd的增加，k_（？）值减小，导致最大~ 3 He能量增加。模拟结果的波数和最大的3 He能量得到的一个二维的，静电，粒子代码定量与理论吻合得很好。它还表明，当初始电子漂移能量为10 keV的数量级，许多3 He离子可以加速到MeV/n的数量级的能量。
Nonlinear development of strong current-driven instabilities can cause selective acceleration of 3He ions through H cyclotron waves with frequencies ω≃2Ω3He (Ω3He is the cyclotron frequency of 3He). Energies of these ions are studied theoretically and numerically. Theoretical expressions for the wave numbers, k∥ and k⊥, of the H cyclotron waves with ω≃2Ω3He and for the maximum energy of 3He ions are presented. As initial electron drift speed vd increases, the value of k⊥ decreases; which leads to the increase in the maximum 3He energy. Simulation results for the wave numbers and for the maximum 3He energy obtained by a two-dimensional, electrostatic, particle code are quantitatively in good agreement with the theory. It is also shown that when the initial electron drift energy is of the order of 10 keV, many 3He ions can be accelerated to energies of the order of MeV/n.