Yield of hot electrons and conversion efficiency of laser energy in femtosecond laser-foil targets

cai da-feng; gu yu-qiu; zheng zhi-jian; zhou wei-min; jiao chun-ye; wen tian-shu; chunyu shu-tai

Volume 17 Issue 01

Jan. 2005

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Article Navigation > High Power Laser and Particle Beams > 2005 > 17(01): 0-

kong xiao-xiao, li quan-feng. Design of convergent Pierce electron gun of accelerator for radiation sterilization by the method of synthesis[J]. High Power Laser and Particle Beams, 2003, 15.

Citation:

cai da-feng, gu yu-qiu, zheng zhi-jian, et al. Yield of hot electrons and conversion efficiency of laser energy in femtosecond laser-foil targets[J]. High Power Laser and Particle Beams, 2005, 17.

kong xiao-xiao, li quan-feng. Design of convergent Pierce electron gun of accelerator for radiation sterilization by the method of synthesis[J]. High Power Laser and Particle Beams, 2003, 15.

Citation:

cai da-feng, gu yu-qiu, zheng zhi-jian, et al. Yield of hot electrons and conversion efficiency of laser energy in femtosecond laser-foil targets[J]. High Power Laser and Particle Beams, 2005, 17.

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Yield of hot electrons and conversion efficiency of laser energy in femtosecond laser-foil targets

1.
Research Center of Laser Fusion,CAEP,P.O.Box 919-986,Mianyang 621900,China;
2.
Department of Physics,Neijiang Normal College,Neijiang 641112,China

Publish Date: 2005-01-15

Abstract

Abstract

The energy spectra of hot electrons have been measured using the magnetic spectrometers, fitted with the LiF thermoluminescent dosimeter (TLD) which were calibrated using Cs137 γ-ray sources, in the interaction of a 130 mJ, 60 fs, 800 nm, 1∶10-6, 7.0×1017 W·cm-2 P-polarized laser incidence on Cu foil target at an angle of 45° with respect to the target normal without any prepulse. The yield of hot electrons and the conversion efficiency of laser energy to energy of hot electrons are 1.19×1010/sr and 4.55%/sr at the normal of target and are 1.83×109/sr and 0.76%/sr at the specular direction of laser, which were deduced from the energy spectra of hot electrons. They were different at various direction because of the hot electrons produced in the interaction of laser-plasma constituted
- femtosecond laser,
- foil target,
- hot electron,
- energy spectrum,
- yield,
- conversion efficiency

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