Experimental observation of transverse modulations in laser-driven proton beams

被引：28

作者：

Metzkes, J. ^{[1
,2
]}

Kluge, T. ^{[1
]}

Zeil, K. ^{[1
]}

Bussmann, M. ^{[1
]}

Kraft, S. D. ^{[1
]}

Cowan, T. E. ^{[1
,2
]}

Schramm, U. ^{[1
,2
]}

机构：

[1] Helmholtz Zentrum Dresden Rossendorf, D-01328 Dresden, Germany

[2] Tech Univ Dresden, D-01062 Dresden, Germany

来源：

NEW JOURNAL OF PHYSICS | 2014年 / 16卷

关键词：

ACCELERATION; PULSES;

D O I：

10.1088/1367-2630/16/2/023008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the experimental observation of transverse modulations in proton beams accelerated from micrometer thick targets which were irradiated with ultra-short (30 fs) laser pulses of a peak intensity of 5x10(20)W cm(-2). The net-like proton beam modulations were recorded using radiochromic film and the data suggest a dependence on laser energy and target thickness for their onset and strength. Numerical simulations suggest that intensity-dependent instabilities in the laser-produced plasma at the target front side lead to electron beam breakup or filamentation, then serving as the source of the observed proton beam modulations.

引用

页数：12

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