强激光与粒子束2013，Vol.25Issue(1)：241-244,4.DOI:10.3788/HPLPB20132501.0241
利用轫致辐射谱回推超热电子温度
Scaling method of hot electron temperature using bremsstrahlung spectra
摘要
Abstract
Bremsstrahlung X-rays are generated when the ultra-short ultra-intense laser interacts with solid targets. The transport of hot electrons in solid targets and the generation of bremsstrahlung X-rays were simulated using Monte Carlo method. Simulation results of the bremsstrahlung produced by 1 MeV electrons interacting with targets show that the slopes of high energy part of bremsstrahlung spectra can not be influenced obviously by target thickness and target material. Simulation of Maxwellian distribution and mono-energetic electron beams interacting with a 30 μm thick Cu target shows that the bremsstrahlung photon spectra from these two electron sources are in agreement with each other. A scaling method of hot electron temperature according to the slope of high energy part of the bremsstrahlung spectrum is presented. The bremsstrahlung energy and number angular distributions were studied for different hot electron temperatures. The results indicate that the forward peaking trait of angular distributions can be enhanced by increasing the electron temperature, thus another scaling method based on this relation is proposed.关键词
超短超强激光/超热电子/轫致辐射/蒙特卡罗方法Key words
ultra-short ultra-intense laser/ hot electron/ bremsstrahlung/ Monte Carlo method分类
数理科学引用本文复制引用
赵宗清,闫永宏,何晟,韩丹,滕建,曹磊峰,谷渝秋,张保汉..利用轫致辐射谱回推超热电子温度[J].强激光与粒子束,2013,25(1):241-244,4.基金项目
国家自然科学基金项目(10975121,10902051,10905051,11174259) （10975121,10902051,10905051,11174259）
中国工程物理研究院发展基金项目(2011B0102021,2009A0102003) （2011B0102021,2009A0102003）
中国工程物理研究院等离子体物理重点实验室基金项目(9140C6802041004) （9140C6802041004）
