Enhanced target normal sheath acceleration based on the laser relativistic self-focusing

被引：23
|
作者：
Zou, D. B. [1 ]
Zhuo, H. B. [1 ]
Yang, X. H. [1 ]
Shao, F. Q. [1 ]
Ma, Y. Y. [1 ]
Yu, T. P. [1 ]
Wu, H. C. [2 ,3 ]
Yin, Y. [1 ]
Ge, Z. Y. [1 ]
Li, X. H. [1 ]
机构：
[1] Natl Univ Def Technol, Coll Sci, Changsha 410073, Hunan, Peoples R China
[2] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Peoples R China
[3] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
来源：
PHYSICS OF PLASMAS | 2014年 / 21卷 / 06期
基金：
中国国家自然科学基金;
关键词：
ION-ACCELERATION; PULSE; GENERATION;
D O I：
10.1063/1.4882245
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The enhanced target normal sheath acceleration of ions in laser target interaction via the laser relativistic self-focusing effect is investigated by theoretical analysis and particle-in-cell simulations. The temperature of the hot electrons in the underdense plasma is greatly increased due to the occurrence of resonant absorption, while the electron-betatron-oscillation frequency is close to its witnessed laser frequency [Pukhov et al., Phys. Plasma 6, 2847 (1999)]. While these hot electrons penetrate through the backside solid target, a stronger sheath electric field at the rear surface of the target is induced, which can accelerate the protons to a higher energy. It is also shown that the optimum length of the underdense plasma is approximately equal to the self-focusing distance. (C) 2014 AIP Publishing LLC.
引用
收藏
页数：6
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