用于平响应X光探测器的复合滤片参数优化

在间接驱动的激光惯性约束聚变实验中,激光辐照产生的X射线能流的测量非常重要,它可以推测出黑腔的辐射温度和激光腔靶的耦合效率,一般通过平响应X射线探测器得到不同角分布的辐射流数据。通过对平响应复合滤片的结构参数进行优化设计,提高了平响应X射线探测器的测量精度。研究了复合滤片中薄金层、厚金层和孔面积比等结构参数对X射线探测器响应平整度的影响规律。从实验结果中可以得出:滤片和金阴极的标定数据和理论结果基本一致,并且薄金层的厚度对探测器整体响应的平整度起到主要作用,厚金层厚度和孔面积比影响较小,优化后探测器的平响应度达到5%,与理论设计相一致,此时的薄金层厚度、厚金层厚度和孔面积比分别为50 nm、380 nm和1:6.1。     

彩虹电子玻璃基板发展历程

玻璃基板是显示产业的关键性基础材料,长期受到国外技术封锁,属于平板显示产业链的"卡脖子"环节.我国电子玻璃产业发展起步较晚,彩虹人历经16年多艰苦卓绝、勠力同心,创造国内多个第一,目前,彩虹股份建成的两条国产G8.5溢流法玻璃基板生产线运行质量、效率均达到国际同行先进水平."十四五"期间,彩虹股份积极统筹布局产业规划,加速提高G8.5玻璃基板国产化率.     

双通道椭圆弯晶谱仪的传递效率分析

双通道椭圆弯晶谱仪(以下简称TCECS)是激光惯性约束核聚变(ICF)研究中非常重要的诊断仪器,在一个通道上用Χ光胶片或X-CCD作空间分辨测量,在另一个通道上用Χ光条纹相机作时间分辨测量,从而同时获得Χ射线的空间和时间特性.TCECS传递效率的高低将影响摄谱效果,而TCECS的传递效率取决于柱面镜的反射率、晶体的积分衍射率、滤光膜的透射率和光谱相对孔径.本文从理论上分析了TCECS传递效率的四种影响因素与波长的关系,并用Matlab 6.1软件进行了数值计算,表明TCECS的传递效率随Χ射线波长增大而减小,这对今后TCECS的结构设计具有重要的指导作用.     

基于水陆统筹的水环境综合治理系统方案编制思考——以珠海横琴一体化区为例

水环境综合治理是当前我国生态文明建设的重要任务,针对各地工程建设碎片化、治理效果不理想的现状,阐述编制系统方案的重要性和技术路线,同时以珠海横琴一体化区为例,以水陆统筹系统性思维为引领,研究水环境综合治理系统方案,思考和探讨现状特征分析及水环境治理方案、水安全保障方案和水生态修复方案的编制要点。     

宽微带X射线分幅相机的研制

研制了应用于平焦场光栅谱仪系统的宽微带X射线分幅相机,微通道板(MCP)微带阴极的宽度为20mm,由四路选通脉冲同时驱动。分幅相机采用模块化设计,由气室、MCP变像管、电控系统、光学CCD记录系统和内嵌式计算机组成,内嵌PC104模块实现相机的远程控制。对相机进行联调实验,测得该相机的时间分辨率为71ps,空间分辨率为20lp/mm,垂直于选通脉冲传播方向的微带均匀性为1.5…1,平行于选通脉冲传播方向的微带均匀性为5.1…1。     

高精度X射线柱面弯晶检测方法

A novel method of cylindrical curved crystal inspection is presented utilized the X-ray tube as the light source and the CMOS detector coated scintillator fibre faceplate as the on-line recorder. According to the design of the high accuracy coaxial turntable, the whole cylindrical curved crystal surface is converted into several line segments to be detected separately, and the arrangement of optical paths and the position shift of spectral lines are calculated analytically. The iron target X-ray tube (the wavelength of K_β feature spectral line is 0.193 6 nm) is selected as the experimental light source. The iron material X-ray tube is chosen as the X-ray source. The sample is quartz cylindrical curved crystal with the 120 mm radius of curvature. The feature spectral lines of Fe-K_α and Fe-K_β are observed clearly. The Fe-K_α spectral line is shifted 96 μm through analyzing image of 9 sample locations on the cylindrical curved crystal. The deviation of the radius is 40 μm and ΔR/R is 0.033%. It shows that the sample was curved in high accuracy. The tested cylindrical curved crystal has been applied on the experiments carried on the large laser facility and the high performance spectral data is acquired. It demonstrates that the method of curved crystal inspection is available and useful.     

超薄玻璃化学钢化过程中产生的缺陷原因分析及解决方案

阐述了超薄玻璃(0.3 mm)化学钢化的缺陷问题,并对其产生的原因进行了分析、总结,同时提出了工艺技术和设备改造的解决方案。     

A High-Efficiency X-Ray Crystal Spectrometer for X-Ray Thomson Scattering

Highly oriented pyrolitic graphite (HOPG) has high X-ray diffraction efficiency due to its unique mosaic crystal structure, and thus is very suitable for its application to X-ray Thomson scattering measurement of solid-density plasmas. In this article, by using the K-shell X-ray source from laser-produced Ti plasma, the properties of the HOPG spectrometer are characterized and compared with those of the flat Pentaerythritol (PET) spectrometer. The results show that the diffraction efficiency of the HOPG spectrometer under focusing condition is an order higher than that of the PET spectrometer, while the spectral resolution of the HOPG is about 320, high enough to be used in the measurement of X-ray Thomson scattering spectra.