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

页数：6

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