Conical crystal spectrograph for high brightness x-ray Kα spectroscopy in subpicosecond laser–solid interaction
Conical crystal spectrograph for high brightness x-ray Kα spectroscopy in subpicosecond laser–solid interaction
复制标题
用于亚皮秒激光-固体相互作用中高亮度 X 射线 Kα 光谱的锥形晶体摄谱仪
DOI：
10.1063/1.1753098
复制
发表时间：
2004
影响因子：
1.6
通讯作者：
T. Hall
中科院分区：
文献类型：
--
作者：
E. Martinolli;M. Koenig;J. Boudenne;E. Perelli;D. Batani;T. Hall
设计了一种高亮度晶体光谱仪，并成功地应用于亚皮秒激光-固体相互作用实验中，对铝的x射线Kα谱进行了研究，用于诊断超热电子对目标的加热。选择锥形几何结构是为了增强空间聚焦，因为光子通量的信噪比极低，并且在只占用目标腔内很小的立体角的情况下具有合理的光谱范围。通过强大的空间聚焦，获得极高的图像亮度，以及良好的光谱分辨率。提出了一个简单的解析模型和三维数值模拟来描述晶体特性。在光学台架和光线追踪码上对光谱仪的性能进行了测试。实验光谱允许我们估计目标温度和表征快速电子传递。摄谱仪被认为是特别有用的，在配置d…
A high brightness crystal spectrograph was designed and successfully used to study the x-ray Kα spectrum of aluminum as a diagnostic for target heating due to suprathermal electrons in subpicosecond laser–solid interaction experiments. Conical geometry was chosen in order to enhance spatial focusing, since an extremely low signal-to-noise ratio was expected for the photon flux, and to have a reasonable spectral range while occupying only a small solid angle within the target chamber. Very high image brightness is obtained through strong spatial focusing, as well as good spectral resolution. A simple analytical model and three-dimensional numerical simulation are presented to describe the crystal characteristics. The performance of the spectrograph was tested both on an optical bench and with a ray-tracing code. The experimental spectra allowed us to estimate the target temperature and characterize the fast electron transport. The spectrograph is considered to be particularly useful, in the configuration d...