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Efficient generation of proton bunches by intense laser pulse with a double-slice-foil target

Published online by Cambridge University Press:  03 July 2012

JUN ZHENG ,
ZHENG-MING SHENG ,
JIN-LU LIU ,
WEI-MIN ZHOU ,
HAN XU  and
JIE ZHANG
JUN ZHENG
Affiliation:
Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China ([email protected])
ZHENG-MING SHENG
Affiliation:
Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China ([email protected]) Beijing National Laboratory of Condensed Matter, Physics, Institute of Physics, CAS, Beijing 100190, China
JIN-LU LIU
Affiliation:
Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China ([email protected])
WEI-MIN ZHOU
Affiliation:
Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
HAN XU
Affiliation:
Institute of Computer Science, National University of Defense Technology, Changsha 410073, China
JIE ZHANG
Affiliation:
Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China ([email protected]) Beijing National Laboratory of Condensed Matter, Physics, Institute of Physics, CAS, Beijing 100190, China
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Abstract

A double-slice-foil target is proposed for the generation of quasi-monoenergetic proton bunches by intense laser pulses. In this new target structure, two symmetrical solid slices are adjoined obliquely to the front side of a plane double-layer target. Two-dimensional particle-in-cell simulations show that a large number of hot electrons are pulled out from solid slices and accelerated forward by direct laser acceleration, which lead to significant enhancement of the sheath field and the produced proton beam energy as compared with the normal plane double-layer target and some other modified targets. It appears that well-collimated proton bunches with energy larger than 200 MeV can be produced at the focused laser intensity of about 1021W/cm2 with the proposed target design.

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Special Issue 4: Progress in Laser Acceleration of Particles , August 2012 , pp. 491 - 496
Copyright
Copyright © Cambridge University Press 2012

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