Development of an X-Ray Spectrometer with High-Throughput and High Resolving Power

传统的色散器件是布拉格晶体和光栅。Bragg晶体具有高分辨能力，E/ deltaE-10<@D13-4@>D1，可用于数十条keVx射线。然而，它本质上是一个单色器。为了分析某个能带，我们必须旋转晶体或使用弯曲晶体。这样，大量的光子就丢失了。光栅具有一定的能带，具有中等的分辨能力，E/delta E-10<@D12-3@>D1。目前，槽密度在技术上被限制在10<@D14@>D1 g/mm。因此，色散角被限制在很小的范围内，必须使用掠入射。我们的新思路是利用薄晶体，获得与大角度、一定带宽的Bragg晶体相当的分辨能力。我们提出了一种新的光谱技术，使用薄晶体，具有相当的能量分辨率与布拉格晶体E/ δ E bbb2000，而具有一定的能带（]SY）。垂直分割的三角形。[] [b] [b] [c]我们做了一个简单的实验来证明这个想法。在实验中，同时检测到Ti K α <@D23@>D2和Ti K α <@D22@>D2两条线，并对两条线进行了清晰的分辨。

Conventional dispersive devises are a Bragg crystal and a grating. The Bragg crystal has a high resolving power with E/ deltaE-10<@D13-4@>D1 and can be used up to several tens keVx rays. However, It Is essentially a monochromator. In order to analyze a certain energy band, we have to rotate the crystal or use a curved crystal. Thus the bulk of photons are loet. A grating has a certain energy band and has moderate resolving power with E/delta E-10<@D12-3@>D1. Currentiy the groove density is technically limited up-to 10<@D14@>D1 g/mm. Therefore the dispersion angle Is limited to be small, and grazing Incidence must be applied. This Is not suitable to prevent the effect of scattering of the 0-th order light Our new idea, using the thin crystal, Is a new approach to get a resolving power comparable to the Bragg crystal with large angle and a certain band width. We propose a new spectroscopic technique using a thin crystal, which has a comparable energy resolution with a Bragg crystal E/delta E >2000, whereas has a certain energy band (]SY.vertically divided triangle.[) E> 6 eV.We performed a simple experiment demonstrating this Idea. In the experimenl, Ti K alpha<@D23@>D2 and Ti K alpha<@D22@>D2 lines were simultaneously detected and both lines were clearly resolved.