超短脉冲激光与固体靶相互作用的硬X射线能谱  

Hard X-ray Energy Spectrum on Ultrashort Pulse Laser Interaction With Solid Target

作　　者：严琪琪[1] 王乃彦[1] 单玉生[1] 李业军[1] 汤秀章[1] 

机构地区：[1]中国原子能科学研究院核技术应用研究所

出　　处：《原子能科学技术》2007年第3期257-261,共5页Atomic Energy Science and Technology

摘　　要：本实验使用高纯锗探测器,运用单光子法,对超短脉冲激光与固体铜靶相互作用产生的硬X射线能谱进行测量。实验结果表明:在激光强度I≈8×1016W/cm2的P极化光以45°入射角照射5 mm厚铜靶、探测立体角为4.5×10-6的实验条件下,产生的硬X射线的能量主要集中在低于100 keV能量范围内,超热电子温度分别为(7.4±0.7)keV和(19.5±1.6)keV。An HPGe detector was used to measure the hard X-ray energy spectrum produced by the interaction between the ultrashort pulse laser and copper solid target. The intensity of the P polarized light is about 8 × 10^16 W/cm^2. The experimental results show that the energy of X-ray is almost less than 100 keV and the temperatures of hot electrons are （7.4＋0.7） keV and （19.5＋1.4） keV, respectively under the condition that the angle of incidence of laser is about 45° and the detection solid angle is about 4.5×10^- 6.

关 键 词：超短脉冲激光 固体铜靶 硬X射线 热电子 

分 类 号：O484[理学—固体物理]