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孙可煦 《核电子学与探测技术》1998,18(5):352-355
本文描述了滤片-X光二极管阵列探测器的同步测量技术,在利用同步时标建立的的归一化坐标系中,不需要明确测量延迟时间,即可恢复由示波器记录的信号脉冲的时间同步特性,然后通过同校正后时间信号还原X光能谱的时间演变过程。 相似文献
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在“星光Ⅱ”激光装置上,采用长柱缝靶模拟X光在柱腔内的输运过程,研究腔壁X光的辐射特性。实验中利用高时空分辨的X射线皮秒分幅相机和软X射线条纹相机从缝口观测腔内壁X光辐射时空分布,得到X光在腔中的输运速率、X光发射时间和轴向强度衰减量。利用X射线CCD针孔透射光栅谱仪观测到腔内X光辐射光谱随空间位置的变化,得到X光在输运过程中被多次吸收和发射后谱的变化特征。用XRD和Dante谱仪分别得到缝口、源和输运末端X光辐射总量和辐射温度。给出了实验中获得的典型结果,并对获得的结果进行了简要的分析讨论。 相似文献
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小型X光二极管的研制 总被引:2,自引:0,他引:2
研制了小型X光二极管(XRD),可用于小型软X光能谱仪。小XRD与大XRD相比,体积为1/30。在“神光Ⅱ”上对小XRD进行了实验考核,结果表明:小XRD与传统的大XRD的时间响应和灵敏度基本一致.达到了预定的目标。对XRD的电路进行了分析.计算出XRD的时间响应和线性饱和电流。 相似文献
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研究了一种测量激光等离子体发射软X光谱强度的新方法——滤波差分法。文中介绍了滤波差分法基本原理,给出了滤波差分对的理论计算结果及实验测量结果,并用此方法获得软X光谱的绝对强度,最后对测量光谱强度的误差进行分析和估算。滤波差分法建立在以往滤波法测量软X光能谱的基础上,利用软X光能谱仪(Dante谱仪)的十个探测道,采取滤波差分法构成两两配对的五个差分对。设计匹配差分对,使其上下K边或L边之外的能响互相抵消,从而使差分对切割能谱,能基本消除高能尾部对所测能区的贡献,提高能谱测试系统的单色性,提高能谱的反演精度,从而建立滤波差分法测量软X光谱的系统。 相似文献
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The propagation of a supersonic heat-wave through copper-doped foam with a density of 50 mg/cm^3 was experimentally investigated. The wave is driven by 140 eV Holhraum radiations generated in a cylindrical gold cavity heated by a 2 kJ, ins laser pulse (0.35 μm). The delayed breakout time of the radiation waves from the rear side of the foam is measured by a three-chromatic streaked x-ray spectrometer (TCS) consisting of a set of three-imaging pinholes and an array of three transmission gratings coupled with an x-ray streak camera (XSC). With one shot, simultaneous measurements of the delays of the drive source and the radiation with two different energies (210 eV, 840 eV) through the foam have been made for the first time. The experimental results indicate that the time delays vary with photon energies. The radiation with an energy of 210 eV propagates at a lower velocity. The radiating heat wave propagates with a velocity that is larger than the sound speed. Using TGS, the transmitting spectrum was measured, and then lower limit of the optical depth which is more than 1, was obtained. The experimental data were in agreement with numerical simulations. 相似文献
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