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

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

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.

Keywords: laser proton acceleration target normal sheath acceleration

Received: 01 June 2009
Revised: 15 July 2009
Accepted manuscript online:

PACS:	52.38.Kd	(Laser-plasma acceleration of electrons and ions)
	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.))

Fund: 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).

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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 2010 Chin. Phys. B 19 055201

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

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