120TW/30fs激光产生的Al等离子体X射线发射谱分析  

Analysis of X-ray spectrum from aluminum plasmas generated by 120TW/30fs laser pulse

作　　者：于新明[1,2] 易有根[1] 胡峰[2] 赵阳[2] 蒲昱东[2] 杨家敏[2] 张继彦[2] 郑志坚[2] 

机构地区：[1]中南大学物理科学与技术学院,长沙410083 [2]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《核聚变与等离子体物理》2011年第2期122-126,共5页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(10874156;10875109)

摘　　要：在SILEX激光装置上利用超强超短激光(120TW/30fs)与Al靶相互作用产生热稠密等离子体。采用类氢共振线与类氦共振线线强比诊断得到电子温度在480～670eV之间,采用类锂jkl伴线与类氦共振线强度比得到电子温度在430～610eV之间,两种诊断方法得到的结果基本一致。用类氦互组合线与类氦共振线强度比方法获得电子密度在1.80×1020～6.45×1020cm?3之间。根据诊断结果,得到了类氢共振线,类氦共振线,类锂伴线(n=2)强度在两种激光对比度下随激光功率密度的变化规律。The hot dense aluminum plasmas have been generated by the interaction with 120TW/30fs laser pulse on the SILEX device.In order to diagnose electron temperature,two different ways have been introduced,which achieved the same result.Using the intensity ratio of H-like resonant to He-like resonant,the temperature between 480eV and 670eV has been derived,the temperature between 430eV and 610eV achived by the Li-like satellite（jkl） to He-like resonant.The electron density is derived from the intensity ratio of He-like intercombination to He-like resonant,the diagnosed electron density is from 2.6×10^20cm 3 to 5.3×10^20cm ^-3.The evolution of the intensity of H-like resonant,He-like resonant,Li-like satellite（abcd,qr,jkl） to laser power intensity have been depicted in two laser intensity contrast ratio.

关 键 词：温度诊断 密度诊断 伴线 激光对比度. 

分 类 号：O434.12[机械工程—光学工程] TL65[理学—光学]