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

高通量、高分辨率X射线光谱仪的研制

基本信息

批准号：
09640320
负责人：
KITAMOTO Shunji
金额：
$ 1.86万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640320/
关键词：
XRAY SPECTROMETER CRYSTAL BRAGG REFLECTION GRATING 分夫器回析格子

项目摘要

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.

传统的色散器件是布拉格晶体和光栅。布拉格晶体具有高分辨能力，E/ deltaE-10<@ D 13 -4@> D 1，可使用高达几十keVx射线。然而，它本质上是单色的。为了分析某个能带，我们必须旋转晶体或使用弯曲的晶体。因此，大量的光子被释放。光栅具有一定的能带，并且具有E/Δ E-10<@D12-3@>D1的中等分辨率。目前，槽密度在技术上被限制为高达10<@D14@> D 1 g/mm。因此，色散角被限制为很小，并且必须应用掠入射。这不适合于防止0阶光的散射效应我们的新想法，使用薄晶体，是一种新的方法，以获得与具有大角度和一定带宽的布拉格晶体相当的分辨率。我们提出了一种新的光谱技术，使用薄晶体，它具有可比的能量分辨率与布拉格晶体E/Δ E >2000，而有一定的能带（）SY垂直划分的三角形。[）E> 6 eV。我们做了一个简单的实验来证明这个想法。在实验1中，同时检测到Ti K α <@D23@>D2和Ti K α <@D22@>D2线，并且两条线都清晰地分辨。