Study of proton acceleration at the target front surface in laser-solid interactions by neutron spectroscopy

被引：11

作者：

Youssef, A ^{[1
]}

Kodama, R

Tampo, M

机构：

[1] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

[3] S Valley Univ, Fac Sci, Dept Phys, Sohag 82524, Egypt

来源：

PHYSICS OF PLASMAS | 2006年 / 13卷 / 03期

关键词：

D O I：

10.1063/1.2183707

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：

Proton acceleration inside solid LiF and CH-LiF targets irradiated by a 450-fs, 20-J, 1053-nm laser at an intensity of 3x10(18) W/cm(2) has been studied via neutron spectroscopy. Neutron spectra produced through the Li-7(p,n)Be-7 reaction that occurs between accelerated protons, at the front surface, and background Li-7 ions inside the target. From measured and calculated spectra, by three-dimensional Monte Carlo code, the maximum energy, total number, and slope temperature of the accelerated protons are investigated. The study indicates that protons originate at the front surface and are accelerated to a maximum energy that is reasonably consistent with the calculated one due to the ponderomotive force. (c) 2006 American Institute of Physics.

引用

页数：4

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