光学学报, 2011, 31 (s1): s100401, 网络出版: 2011-06-23  

激光等离子体X射线偏振度探测

X-Ray Line Polarization Detection for Laser-Produced Plasmas
作者单位
重庆大学光电技术及系统教育部重点实验室, 重庆 400030
摘要
为了对激光等离子体偏振状态进行诊断,研究了X射线偏振度的测量方案及推算方法,利用两台晶体谱仪分别在相互正交的两方向对等离子体辐射的X射线进行探测,以确定其偏振度。光谱仪采用PET晶体作为分光器件,成像板接收X射线光谱信号,其接收面积为15 mm×35 mm,在2×10 J激光装置上进行了偏振检测实验。实验结果表明在两方向同时得到Al的类He谱线及类Li伴线,依据类He共振线w及互组合线y两方向光谱相对强度计算出共振线偏振度数据,利用不同发次实验分析入射激光能量和X射线偏振度的关系,探索了X射线偏振度对激光等离子体电子温度诊断的影响。
Abstract
In order to diagnose X-ray line polarization of laser-produced plasmas, two crystal spectrometers have been used for measuring spectra. They can measure X-ray lines radiated by plasmas in directions of vertical and horizontal for detection of polarization degree. Measuring principle of X-ray polarization is studied in detail and mathematical computation is given. PET is dispersion crystal of spectrometer and X-ray spectra emitted from planar Al target are photographed by using spectrometers with two pieces of image plates (15 mm×35 mm) on 2×10 J laser facility. Experimental result shows that the spectra of He-like and Li-like in directions of vertical and horizontal can be obtained. Polarization degree of resonance line w is calculated based on intensity rate of resonance line w and intercombination line y. The relation between laser energy and X-ray polarization degree is found with experimental results of two shots and effect of polarization degree on diagnosis of plasma temperature is discussed.

施军, 肖沙里, 徐道连, 钱家渝, 王洪建. 激光等离子体X射线偏振度探测[J]. 光学学报, 2011, 31(s1): s100401. Shi Jun, Xiao Shali, Xu Daolian, Qian Jiayu, Wang Hongjian. X-Ray Line Polarization Detection for Laser-Produced Plasmas[J]. Acta Optica Sinica, 2011, 31(s1): s100401.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!