kHz激光与固体靶相互作用产生的X射线源  

X-ray source produced by laser solid target interaction at kHz repetition rate

作　　者：黄开[1] 闫文超[1] 李明华[1] 陶孟泽[1,2] 陈燕萍[2] 陈洁[2] 远晓辉[2] 赵家瑞[1] 马勇[1] 李大章[3] 高杰[3] 陈黎明[1] 张杰[2] 

机构地区：[1]中国科学院物理研究所光物理重点实验室,北京100190 [2]上海交通大学激光等离子体教育部重点实验室,上海200240 [3]中国科学院高能物理研究所,北京100049

出　　处：《物理学报》2013年第20期328-332,共5页Acta Physica Sinica

基　　金：科技部国家重大科学仪器设备开发专项(批准号:2012YQ12004705);国家自然科学基金(批准号:11175192)资助的课题~~

摘　　要：利用kHz激光与固体靶相互作用产生了平均流强为1.3×107photons·sr 1·s 1的X射线源,研究了激光的对比度和能量对激光与固体靶相互作用产生的X射线能谱及Kα产额的影响,使用刀边成像技术测量了X射线源的源尺寸,并进行了初步的成像实验.实验中观察到对于非相对论级别的激光脉冲,降低激光的对比度有利于提高Kα产额,而使用高对比度高强度激光,更有利于获得高通量高信噪比X射线源.X-ray radiation with an average flux of 1.3×107 photons · sr？1· s？1 is generated by the interaction between ultra-short laser and solid target working at 1 kHz repetition rate. A knife edge is introduced to measure the source size. The X-ray emission shows obvious dependences on the laser contrast and intensity. It is discovered that at lower intensity the Kαyield increases with lower laser contrast. However, by using high contrast and high intensity laser pulses, high flux and high signal-to-noise ratio Kα X-ray can be generated. The generated source is used in proof-of-principle radiograghic imaging of simple specimens.

关 键 词：kHz激光 固体靶 X射线 

分 类 号：TL503.4[核科学技术—核技术及应用]