A short working distance multiple crystal x-ray spectrometer

被引：28

作者：

Dickinson, B. ^{[1
]}

Seidler, G. T. ^{[1
]}

Webb, Z. W. ^{[1
]}

Bradley, J. A. ^{[1
]}

Nagle, K. P. ^{[1
]}

Heald, S. M. ^{[2
]}

Gordon, R. A. ^{[3
]}

Chou, I. M. ^{[4
]}

机构：

[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[2] Argonne Natl Labs, Adv Photon Source, Argonne, IL 60439 USA

[3] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[4] US Geol Survey, Reston, VA 20192 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2008年 / 79卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

dysprosium; manganese; manganese compounds; XANES; X-ray emission spectra; X-ray fluorescence analysis; X-ray spectrometers;

D O I：

10.1063/1.3048544

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

For x-ray spot sizes of a few tens of microns or smaller, a millimeter-sized flat analyzer crystal placed similar to 1 cm from the sample will exhibit high energy resolution while subtending a collection solid angle comparable to that of a typical spherically bent crystal analyzer (SBCA) at much larger working distances. Based on this observation and a nonfocusing geometry for the analyzer optic, we have constructed and tested a short working distance (SWD) multicrystal x-ray spectrometer. This prototype instrument has a maximum effective collection solid angle of 0.14 sr, comparable to that of 17 SBCA at 1 m working distance. We find good agreement with prior work for measurements of the Mn K beta x-ray emission and resonant inelastic x-ray scattering for MnO, and also for measurements of the x-ray absorption near-edge structure for Dy metal using L alpha(2) partial-fluorescence yield detection. We discuss future applications at third- and fourth-generation light sources. For concentrated samples, the extremely large collection angle of SWD spectrometers will permit collection of high-resolution x-ray emission spectra with a single pulse of the Linac Coherent Light Source. The range of applications of SWD spectrometers and traditional multi-SBCA instruments has some overlap, but also is significantly complementary.

引用

页数：8

共 41 条

[1] An active-optic x-ray fluorescence analyzer with high energy resolution, large solid angle coverage, and a large tuning range [J].