Generation of low-divergence megaelectronvolt ion beams from thin foil irradiated with an ultrahigh-contrast laser

被引：18
|
作者：
Wang, W. P. [1 ]
Zhang, H. [1 ]
Wu, B. [2 ]
Jiao, C. Y. [2 ]
Wu, Y. C. [2 ]
Zhu, B. [2 ]
Dong, K. G. [2 ]
Hong, W. [2 ]
Gu, Y. Q. [2 ]
Shen, B. F. [1 ]
Xu, Y. [1 ]
Leng, Y. X. [1 ]
Li, R. X. [1 ]
Xu, Z. Z. [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
[2] CAEP, Laser Fus Res Ctr, Sci & Technol Plasma Phys Lab, Mianyang 621900, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 21期
基金：
中国国家自然科学基金;
关键词：
RELATIVISTIC IONS; COLLIMATED BEAMS; PROTON-BEAMS; PLASMA; DRIVEN; PULSES; MULTI;
D O I：
10.1063/1.4766439
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Megaelectronvolt (MeV) ion beams with low divergence (10 degrees) are experimentally generated from a thin foil irradiated by an ultrahigh-contrast laser at a peak intensity of similar to 10(18) W/cm(2). The high-contrast (similar to 10(11)) laser is obtained with a pulse cleaner based on noncollinear optical-parametric amplification and second-harmonic generation processes. The effects of the foil density, foil thickness, as well as the density gradients at the front and back sides of the foil are investigated with two-dimensional particle-in-cell simulations. The beam parameters of maximum energy and divergence strongly depend on the density gradients at the back side of the foil. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766439]
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页数：5
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