Direct experimental evidence of back-surface ion acceleration from laser-irradiated gold foils

被引：146

作者：

Allen, M ^{[1
]}

Patel, PK

Mackinnon, A

Price, D

Wilks, S

Morse, E

机构：

[1] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.93.265004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Au foils were irradiated with a 100-TW, 100-fs laser at intensities greater than 10(20) W/cm(2) producing proton beams with a total yield of similar to10(11) and maximum proton energy of >9 MeV. Removing contamination from the back surface of Au foils with an Ar-ion sputter gun reduced the total yield of accelerated protons to less than 1% of the yield observed without removing contamination. Removing contamination from the front surface (laser-interaction side) of the target had no observable effect on the proton beam. We present a one-dimensional particle-in-cell simulation that models the experiment. Both experimental and simulation results are consistent with the back-surface acceleration mechanism described in the text.

引用

页数：4

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