Fraction and Temperature of Hot Electrons Generated by Laser—Plasma Interaction at the shenguang—Ⅱ Laser Facility
作者机构：InstituteofAppliedPhysicsandComputationalMathematicsP.O.Box8009Beijing100088 CentreofLaserFusionChinaAcademyofEngineeringPhysicsP.O.Box919Mianyang621900
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2002年第19卷第2期
页 面：224-226页
核心收录：
学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学]
基 金：国家863计划 国家自然科学基金 中国工程物理研究院科学技术基金
摘 要：We have developed a three-dimensional electron-photon Monte Carlo transmission (MCT) code. The conversion-transmissivity coefficient of hot electron x-ray, ηct, is analysed theoretically and simulated numerically using the MCT code. Experiments of disc and cylindrical targets have been performed at the Shenguang-II laser facility. A multi-channel filter-fluorescence spectrometer was used to obtain the hard x-ray spectrum. The temperature and energy of hot electrons are induced from the hard x-ray spectrum and the ηct value. The average energy fraction of hot electrons is 14% of incident laser energy for the 1ωNd laser and the spherical target with an average temperature of hot electrons of 36keV, while it is 15% for the 1ωNd laser and the cavity target with an average temperature of 54keV. We have also obtained the results of 5.6% and 13.3 keV for the 3ωNd laser and the disc target, 4.9% and 17.9keV for the 3ωNd laser and the half cavity target with a thin wall, and 2.1% and 22.4keV for those with a thick wall. The experimental results agree with theory and simulation.
维普期刊数据库