X-ray characterization by energy-resolved powder diffraction

被引：0

作者：

Cheung, G. ^{[1
]}

Hooker, S. M.

机构：

[1] Univ Oxford, John Adams Inst, Parks Rd, Oxford OX1 3PU, England

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2016年 / 19卷 / 08期

基金：

英国科学技术设施理事会; 英国工程与自然科学研究理事会;

关键词：

LASER; CRYSTALS;

D O I：

10.1103/PhysRevAccelBeams.19.082801

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A method for single-shot, nondestructive characterization of broadband x-ray beams, based on energy-resolved powder diffraction, is described. Monte-Carlo simulations are used to simulate data for x-ray beams in the keV range with parameters similar to those generated by betatron oscillations in a laser-driven plasma accelerator. The retrieved x-ray spectra are found to be in excellent agreement with those of the input beams for realistic numbers of incident photons. It is demonstrated that the angular divergence of the x rays can be deduced from the deviation of the detected photons from the Debye-Scherrer rings which would be produced by a parallel beam. It is shown that the angular divergence can be measured as a function of the photon energy, yielding the angularly resolved spectrum of the input x-ray beam.

引用

页数：9

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