High resolution X-ray spherically bent crystal spectrometer for laser-produced plasma diagnostics  

作　　者：肖沙里 王洪建 施军 唐昶环 刘慎业 

机构地区：[1]The Key Laboratory of Optoelectronic Technology and System,Ministry of Education,Chongqing University [2]Research Center of Laser Fusion,China Academy of Engineering Physics

出　　处：《Chinese Optics Letters》2009年第1期92-94,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.10576041

摘　　要：A new high spectral resolution crystal spectrometer is designed to measure very low emissive X-ray spectra of laser-produced plasma in 0.5-0.9 nm range. A large open aperture （30 ×20 （mm）） mica （002） spherically bent crystal with curvature radius R = 380 mm is used as dispersive and focusing element. The imaging plate is employed to obtain high spectral resolution with effective area of 30 × 80 （mm）. The long designed path of the X-ray spectrometer beam is 980 mm from the source to the detector via the crystal. Experiment is carried out at a 20-J laser facility. X-ray spectra in an absolute intensity scale is obtained from Al laserproduced plasmas created by laser energy of 6.78 J. Samples of spectra obtained with spectral resolution of up to E/△E - 1500 are presented. The results clearly show that the device is good to diagnose laser high-density plasmas.A new high spectral resolution crystal spectrometer is designed to measure very low emissive X-ray spectra of laser-produced plasma in 0.5-0.9 nm range. A large open aperture （30 ×20 （mm）） mica （002） spherically bent crystal with curvature radius R = 380 mm is used as dispersive and focusing element. The imaging plate is employed to obtain high spectral resolution with effective area of 30 × 80 （mm）. The long designed path of the X-ray spectrometer beam is 980 mm from the source to the detector via the crystal. Experiment is carried out at a 20-J laser facility. X-ray spectra in an absolute intensity scale is obtained from Al laserproduced plasmas created by laser energy of 6.78 J. Samples of spectra obtained with spectral resolution of up to E/△E - 1500 are presented. The results clearly show that the device is good to diagnose laser high-density plasmas.

关 键 词：Laser produced plasmas Lasers MICA Plasma diagnostics PLASMAS Silicate minerals Spectral resolution SPECTROMETERS SPECTROMETRY X ray analysis X ray spectrographs X ray spectrometers 

分 类 号：O433.1[机械工程—光学工程]