The characteristics of proton beam generated in the interaction of an ultrashort laser pulse with a large prepulse with solid foils are experimentally investigated. It is found that the proton beam emitted from the rear surface is not well collimated, and a “ring-like” structure with some “burst-like” angular modulation is presented in the spatial distribution. The divergence of the proton beam reduces significantly when the laser intensity is decreased. The “burst-like” modulation gradually fades out for the thicker target. It is believed that the large divergence angle and the modulated ring structure are caused by the shock wave induced by the large laser prepulse. A one-dimensional hydrodynamic code, MED103, is used to simulate the behavior of the shock wave produced by the prepulse. The simulation indicates that the rear surface of the foil target is significantly modified by the shock wave, consequently resulting in the experimental observations.
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October 2006
Brief Report|
October 16 2006
Effects of shock waves on spatial distribution of proton beams in ultrashort laser-foil interactions
M. H. Xu;
M. H. Xu
1Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, China
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Y. T. Li;
Y. T. Li
1Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, China
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X. H. Yuan;
X. H. Yuan
1Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, China2State Key Laboratory of Transient Optics Technology,
Xi’an Institute of Optics and Precision Mechanics
, Chinese Academy of Sciences, Xi’an 710068, China
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Q. Z. Yu;
Q. Z. Yu
1Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, China
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S. J. Wang;
S. J. Wang
1Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, China
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W. Zhao;
W. Zhao
2State Key Laboratory of Transient Optics Technology,
Xi’an Institute of Optics and Precision Mechanics
, Chinese Academy of Sciences, Xi’an 710068, China
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X. L. Wen;
X. L. Wen
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China
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G. C. Wang;
G. C. Wang
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China4Atomic and Molecular Physics Institute,
Sichuan University
, Chengdu 610065, China
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C. Y. Jiao;
C. Y. Jiao
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China
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Y. L. He;
Y. L. He
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China
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S. G. Zhang;
S. G. Zhang
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China
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X. X. Wang;
X. X. Wang
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China4Atomic and Molecular Physics Institute,
Sichuan University
, Chengdu 610065, China
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W. Z. Huang;
W. Z. Huang
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China
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Y. Q. Gu;
Y. Q. Gu
3National Key Laboratory of Laser Fusion,
China Academy of Engineering Physics
, Mianyang 621900, China
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
Phys. Plasmas 13, 104507 (2006)
Article history
Received:
May 08 2006
Accepted:
September 11 2006
Citation
M. H. Xu, Y. T. Li, X. H. Yuan, Q. Z. Yu, S. J. Wang, W. Zhao, X. L. Wen, G. C. Wang, C. Y. Jiao, Y. L. He, S. G. Zhang, X. X. Wang, W. Z. Huang, Y. Q. Gu, J. Zhang; Effects of shock waves on spatial distribution of proton beams in ultrashort laser-foil interactions. Phys. Plasmas 1 October 2006; 13 (10): 104507. https://doi.org/10.1063/1.2358971
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