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

传统的色散器件有布拉格晶体和光栅。Bragg晶体具有高分辨率，E/deltaE-10&lt；@D13-4@&gt；d1，可用于高达数十keVx射线。然而，它本质上是一种单色仪。为了分析某一能带，我们必须旋转晶体或使用弯曲晶体。因此，大部分光子都是LOET。光栅具有一定的能带，具有中等的分辨率，E/δE-10&lt；@d12-3@&gt；d1。目前，凹槽密度在技术上被限制在10&lt；@d14@&gt；d1 g/mm。因此，色散角被限制在较小的范围内，必须采用掠入射。这不适合于防止0阶光的散射效应，我们的新想法是利用薄晶体来获得与大角度和一定带宽的布拉格晶体相当的分辨率。我们提出了一种使用薄晶体的新的光谱技术，它具有与Bragg晶体E/Delta E&gt；2000相当的能量分辨率，而具有一定的能带垂直分割的三角形。[)E&gt；6 eV。我们进行了一个简单的实验来证明这一想法。实验中同时检测到了TiKα-D2和TiKα-D2两条谱线，且这两条谱线都得到了清晰的分辨。

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.