Generation of fast protons in moderate-intensity  laser－plasma interaction from rear sheath

doi:10.1088/1674-1056/19/5/055201

中国物理B ›› 2010, Vol. 19 ›› Issue (5): 55201-055201.doi: 10.1088/1674-1056/19/5/055201

Generation of fast protons in moderate-intensity laser－plasma interaction from rear sheath

谭志新, 黄永盛, 兰小飞, 路建新, 段晓礁, 王雷剑, 杨大为, 郭士伦, 王乃彦

High Power Excimer Laser Laboratory, China Institute of Atomic Energy, Beijing 102413, China

收稿日期:2009-06-01 修回日期:2009-07-15 出版日期:2010-05-15 发布日期:2010-05-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.~10834008), and the State Key Development Program for Basic Research of China (Grant No.~2006CB806004).

Generation of fast protons in moderate-intensity laser－plasma interaction from rear sheath

High Power Excimer Laser Laboratory, China Institute of Atomic Energy, Beijing 102413, China

Received:2009-06-01 Revised:2009-07-15 Online:2010-05-15 Published:2010-05-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.~10834008), and the State Key Development Program for Basic Research of China (Grant No.~2006CB806004).

摘要/Abstract

摘要： Forward fast protons are generated by the moderate-intensity laser--foil interaction. Protons with maximum energy 190~keV are measured by using magnetic spectrometer and CR-39 solid state track detectors along the direction normal to the rear surface. The experimental results are also modeled by the particle-in-cell method, investigating the time-varying electron temperature and the rear sheath field. The temporal and spatial structure of the sheath electrical field, revealed in the simulation, suggests that these protons are accelerated by target normal sheath acceleration (TNSA) mechanism.

Abstract: Forward fast protons are generated by the moderate-intensity laser--foil interaction. Protons with maximum energy 190 keV are measured by using magnetic spectrometer and CR-39 solid state track detectors along the direction normal to the rear surface. The experimental results are also modeled by the particle-in-cell method, investigating the time-varying electron temperature and the rear sheath field. The temporal and spatial structure of the sheath electrical field, revealed in the simulation, suggests that these protons are accelerated by target normal sheath acceleration (TNSA) mechanism.

Key words: laser proton acceleration, target normal sheath acceleration

中图分类号: (Laser-plasma acceleration of electrons and ions)

52.38.Kd

52.40.Kh (Plasma sheaths) 52.65.Rr (Particle-in-cell method) 52.50.Jm (Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))

谭志新, 黄永盛, 兰小飞, 路建新, 段晓礁, 王雷剑, 杨大为, 郭士伦, 王乃彦. Generation of fast protons in moderate-intensity laser－plasma interaction from rear sheath[J]. 中国物理B, 2010, 19(5): 55201-055201.

Tan Zhi-Xin(谭志新), Huang Yong-Sheng(黄永盛), Lan Xiao-Fei(兰小飞) , Lu Jian-Xin(路建新), Duan Xiao-Jiao(段晓礁), Wang Lei-Jian(王雷剑), Yang Da-Wei(杨大为), Guo Shi-Lun(郭士伦), and Wang Nai-Yan(王乃彦). Generation of fast protons in moderate-intensity laser－plasma interaction from rear sheath[J]. Chin. Phys. B, 2010, 19(5): 55201-055201.

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Generation of fast protons in moderate-intensity laser－plasma interaction from rear sheath

Generation of fast protons in moderate-intensity laser－plasma interaction from rear sheath

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