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.
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收藏
页数：12
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