外文题目: The controllable electron-heating by external magnetic fields at relativistic laser-solid interactions in the presence of large scale pre-plasmas
作者: Wu, D.; Luan, S. X.; Wang, J. W.; Yu, W.; Gong, J. X.; Cao, L. H.; Zheng, C. Y.; He, X. T.
刊名: Plasma Phys. Control. Fusion
年: 2017 卷: 59 期: 6 文章编号：65004
英文关键词:
laser plasma interactions; laser driven ion acceleration; fast ignition of inertial; confinement fusion
HIGH-POWER LASER
英文摘要:
The two-stage electron acceleration/ heating model (Wu et al 2017 Nucl. Fusion 57 016007 and Wu et al 2016 Phys. Plasmas 23 123116) is extended to the study of laser magnetized-plasmas interactions at relativistic intensities and in the presence of large-scale preformed plasmas. It is shown that the electron-heating efficiency is a controllable value by the external magnetic fields. Detailed studies indicate that for a right-hand circularly polarized laser, the electron heating efficiency depends on both strength and directions of external magnetic fields. The electronheating is dramatically enhanced when the external magnetic field is of B equivalent to omega(c) /omega(0) > 1. When magnetic field is of negative direction, i.e. B < 0, it trends to suppress the electron heating. The underlining physics-the dependences of electron-heating on both the strength and directions of the external magnetic fields-is uncovered. With -infinity < B < 1, the electron-heating is explained by the synergetic effects by longitudinal charge separation electric field and the reflected 'envelop-modulated' CP laser. It is indicated that the 'modulation depth' of reflected CP laser is significantly determined by the external magnetic fields, which will in turn influence the efficiency of the electron-heating. While with B > 1, a laser front sharpening mechanism is identified at relativistic laser magnetized-plasmas interactions, which is responsible for the dramatical enhancement of electron-heating.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1088/1361-6587/aa69a9


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