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Research on X-ray emission from highly ionized ions produced by a ultra-high power laser irradiation

超高功率激光照射产生的高电离离子X射线发射研究

基本信息

批准号：
03650044
负责人：
DAIDO Hiroyuki
金额：
$ 0.7万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650044/
关键词：
Laser Plasma X-ray source Ultra-short pulse laser high brightness laser Highly ionized ion X-ray spectroscopy X-ray laser recombining plasma レ-ザ-プラズマX線源超短パルスレ-ザ-高輝度レ-ザ-

项目摘要

We measured the x-ray spectra from intense laser produced plasmas of various atomic number materials such as atomic number form 6 to 82 using a high resolution spectrometer. We also estimated absolute x-ray flux using a detector which was calibrated a synchrotoron machine leading to judge the possible way of its applications. We are investigating the scaling of the x-ray emission spectra from various atomic number materials precisely.We also report simultaneous amplification of hydrogen-like sodium (Na) and fluorine (F) Balmer-alpha lines (wavelengths: 5.42 and 8.10 nm, respectively) having gainlength product of -4. A30J/20ps/0.53 mum laser pulse was line focused on to a 6.3 mm long, 50mum wide and 400nm-thick sodium-fluoride (NaF) stripe target, at an irradiance of 5X10^<14> W/cm^2. The time and space-integrated gain coefficients measured with cross calibrated on-and off-axis spectrometers are 5.9cm^<-1> for both Na and F Balmer-alpha lines. The space resolved on-axis spectrometer shows that the spatial peak intensity of the F line is located 50mum-200mum away from the original target surface while that of Na is 0mum-100mum which agrees qualitatively with the hydrodynamic calculations. The fine structure intensity ratio of a fluorine amplified line was also measured with the high resolution spectrometer having a resolving power of more than 2100.

用高分辨率光谱仪测量了原子序数为6 ~ 82的强激光等离子体的x射线光谱。我们还利用同步加速器校准的探测器估计了绝对x射线通量，从而判断其应用的可能方式。我们精确地研究了不同原子序数材料的x射线发射光谱的标度。我们还报道了同时扩增的类氢钠（Na）和氟(F)巴尔默- α谱线（波长分别为5.42和8.10 nm）的增益长乘积为-4。A30J/20ps/0.53 μ m激光脉冲线聚焦到长6.3 mm、宽50mm、厚400nm的氟化钠条纹靶上，辐照度为5X10^<14> W/cm^2。用交叉校准的轴上和离轴光谱仪测量的Na和F巴尔默- α线的时间和空间集成增益系数为5.9cm^<-1>。空间分辨轴向谱仪显示，F线的空间峰强度位于距离原目标表面50mm ~ 200mum处，Na线的空间峰强度在0mm ~ 100mum处，与流体力学计算结果定性一致。用分辨率在2100以上的高分辨率光谱仪测量了氟放大线的精细结构强度比。