Shpilman Z, Silberstein S, Rubin D, Ehrlich Y, Oysher Z, Ferber Y, Levy I
Plasma Physics Department, Soreq NRC, Yavne 81800, Israel.
Mechanical Engineering Department, Soreq NRC, Yavne 81800, Israel.
Rev Sci Instrum. 2021 Mar 1;92(3):033527. doi: 10.1063/5.0040581.
High-temperature, high-density experiments require a simultaneous understanding of temporal and spectral regions. The spectral x-ray streak camera (SXSC) is a new high-temporal-resolution spectral x-ray diagnostic system that allows researchers to differentiate between soft and hard x-ray regions. The diagnostic offers three spectral channels with a wide spectral range, one direct channel that includes a filter and two indirect channels that include both mirrors and filters. The opto-mechanical design positions the filtered radiation at three different locations along the streak photo-cathode (PC) slit to provide time-dependent spectral channels with pico-second temporal resolution. A moderate spatial resolution (150-700 μm) is achieved using slits perpendicular to the PC slit, while the slit width is optimized according to the central channel wavelength (for each channel). The diagnostic system covers a spectral range of 30-500 eV for the mirror channels and >1300 eV for the direct channel. The temporal and spatial axes of the streak camera are calibrated with respect to a sequence of x-ray pulses. The SXSC diagnostic system is tested and analyzed using Marshak-wave emission from an SiO foam that was heated by a laser-beam irradiated halfraum. The SXSC results are compared to measurements from an x-ray diode array with similar spectral channels.
高温、高密度实验需要同时了解时间和光谱区域。光谱X射线条纹相机（SXSC）是一种新型的具有高时间分辨率的光谱X射线诊断系统，它能让研究人员区分软X射线和硬X射线区域。该诊断设备提供三个具有宽光谱范围的光谱通道，一个直接通道包含一个滤光片，两个间接通道包含反射镜和滤光片。光机械设计将经过滤波的辐射沿条纹光电阴极（PC）狭缝定位在三个不同位置，以提供具有皮秒时间分辨率的随时间变化的光谱通道。使用垂直于PC狭缝的狭缝可实现中等空间分辨率（150 - 700μm），同时狭缝宽度根据中心通道波长（针对每个通道）进行优化。该诊断系统的镜通道光谱范围为30 - 500eV，直接通道光谱范围大于1300eV。条纹相机的时间轴和空间轴相对于一系列X射线脉冲进行校准。利用由激光束照射半腔加热的SiO泡沫产生的马尔沙克波发射对SXSC诊断系统进行测试和分析。将SXSC的结果与具有相似光谱通道的X射线二极管阵列的测量结果进行比较。
