Yield and spatial distributions of femtosecond laser-produced protons

Tang Cuiming; Wang Changjun; Wang Yaping; Wang Guangchang; Zhang Jianwei; Zheng Zhijian

doi:10.3788/HPLPB20122412.2837

Volume 24 Issue 12

Nov. 2012

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Article Navigation > High Power Laser and Particle Beams > 2012 > 24(12): 2837-2840

Huang CHunling, Zeng Bing, Zeng SHuguang, et al. Scanning filtering based on Fabry Perot etalon with electro optic crystal[J]. High Power Laser and Particle Beams, 2012, 24: 289-292. doi: 10.3788/HPLPB20122402.0289

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Tang Cuiming, Wang Changjun, Wang Yaping, et al. Yield and spatial distributions of femtosecond laser-produced protons[J]. High Power Laser and Particle Beams, 2012, 24: 2837-2840. doi: 10.3788/HPLPB20122412.2837

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Yield and spatial distributions of femtosecond laser-produced protons

doi: 10.3788/HPLPB20122412.2837

1.
Department of Physics and Mathematics,Sichuan University of Science and Engineering,Zigong 643000,China;
2.
Teaching and Research Section of Physics,Jinzhou Medical College,Jinzhou,121004,China;
3.
Teaching and Research Section of Physics,Chengdu Medical College,Chengdu 610500,China;
4.
Research Center of Laser Fusion,CAEP,P.O.Box 919-986,Mianyang 621900,China

Received Date: 2012-01-14
Rev Recd Date: 2012-03-20
Publish Date: 2012-11-05

Abstract

Abstract

For studing the yield and spatial distributions of protons produced in the interaction of femtosecond laser with plasmas, protons behavior at the normal direction of the rear surface of the target irradiated by ultra-intensity pulse laser irradiated solid targets was explored on SILEX-I laser facility. The yield and spatial distributions of the protons with different target thicknesses were recorded by radiochromic film (RCF) HD810. The results show that the optics density (OD) is closely correlated with the protons flux, OD values increase with the increasing of proton beam flux;For fixed thickness of C8H8 layer, the proton beam flux and yield of protons and OD of RCF decrease with the increasing Cu layer thickness;for the same thickness of targets, the OD and yield of protons decrease with the decreases of laser intensity;And the corresponding spatial profile of proton beam shows ring-, filament-, and disc-like distribution. The size of the distribution is independent of laser focus.
- femtosecond laser,
- yield of protons,
- spatial distributions,
- optic density,
- radiochromic film

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