超强激光超热电子激发的KαX射线发射研究  

Investigation on Kα X-ray emission from ultraintense laser-produced hot electrons

作　　者：黄文忠[1] 李玉同[2] 熊勇[1] 张双根[1] 温贤伦[1] 洪伟[1] 谷渝秋[1] 温天舒[1] 何颖玲[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,绵阳621900 [2]中国科学院物理研究所北京凝聚态物理国家实验室,北京100080

出　　处：《物理学报》2008年第1期111-115,共5页Acta Physica Sinica

基　　金：高温高密度等离子体物理国防科技重点实验室基金(批准号:9140C6802020602)资助的课题~~

摘　　要：建立了无色散型X射线谱仪.利用SILEX-I激光装置的超强激光辐照固体物质,分别在靶前、后定量测量了Cu和Mo物质在不同激光功率密度时的X射线谱和Kα光子产额,推导了不同激光强度时的KαX射线光子转换效率.实验发现,打靶激光能量越高,靶后出射的Kα产额越高,100μmMo靶可获得10-5量级转换效率.A dispersionless X-ray Kα spectrometer is constructed. The experiments were performed using the SILEX-I laser facility. The Ka X-ray emission from uhraintense laser-plasma interactions is measured with the spectrometer in front of and behind the foil targets. The conversion efficiency from laser energy to Ka X-ray is obtained. The experimental results show that the Ka yield increases with the laser energy. With a 100μm thick Mo foil, the conversion efficiency is 10^-5.

关 键 词：x射线发射 激光 物质相互作用 Kα谱仪 

分 类 号：O434.1[机械工程—光学工程]