Multiple acoustic modes stimulated Brillouin scattering in hydrogen plasmas
Multiple acoustic modes stimulated Brillouin scattering in hydrogen plasmas
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DOI：
10.1088/0741-3335/54/9/095004
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发表时间：
2012-09
影响因子：
2.2
通讯作者：
Z. J. Liu;L. Hao;J. Xiang;S. P. Zhu;C. Zheng;L. Cao;X. T. He
中科院分区：
文献类型：
--
作者：
Z. J. Liu;L. Hao;J. Xiang;S. P. Zhu;C. Zheng;L. Cao;X. T. He
模拟了氢等离子体中不同离子温度下的受激后向布里渊散射。在时间积分散射谱中有多个分离的峰，这表明存在多个声学模式，特别是当离子和电子的温度几乎相等时。离子声学模式的相速度可以是从一个到几个离子热速度。大多数的离子声模式是严重阻尼的麦克斯韦速度分布函数，但它们可以被激发在受激布里渊散射过程中，由于离子捕获。
Stimulated backward Brillouin scattering with a variety of ion temperatures in hydrogen plasmas is simulated. There are several separated peaks in the time-integrated scattering spectra, which indicate the existence of several acoustic modes, especially for the nearly equal temperature of ions and electrons. The phase velocities of ion acoustic modes can be from one to several ion thermal velocities. Most of the ion acoustic modes are heavily damped with a Maxwellian velocity distribution function, but they can be excited in the stimulated Brillouin scattering process due to ion trapping.