An X-ray focusing monochromator composed of poly-capillary X-ray lenses and highly oriented pyrolytic graphite

被引：2

作者：

Wang, Xingyi ^{[1
,2
]}

Zhou, Mo ^{[1
,2
]}

Duan, Jiayu ^{[1
,2
]}

Luo, Heng ^{[1
,2
]}

Liu, Xin ^{[1
,2
]}

Lin, Xiaoyan ^{[1
,2
]}

Li, Yude ^{[1
,2
]}

机构：

[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol, Minist Educ, Beijing 100875, Peoples R China

[2] Beijing Radiat Ctr, Beijing 100875, Peoples R China

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2019年 / 461卷

基金：

美国国家科学基金会;

关键词：

Poly-capillary X-ray lens; X-ray focusing monochromator; Highly oriented pyrolytic graphite; DOUBLY-CURVED CRYSTAL; OPTICS; GLASS;

D O I：

10.1016/j.nimb.2019.10.013

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An X-ray focusing monochromator is proposed, which is composed of an X-ray source, a highly oriented pyrolytic graphite and two poly-capillary X-ray lenses. Through the function of the front poly-capillary X-ray lens, the X-ray beams diffracted by the highly oriented pyrolytic graphite changed from a linear pattern with high divergence in the vertical direction, to a circular pattern with low divergence, and more X-rays are diffracted than the conventional monochromator of combining an X-ray source with a flat crystal. The post poly-capillary X-ray lens can focus the diffracted X-ray beams with low divergence into a small focal spot with high gain in power density. The results show that the gains of circular apertures with diameters of 320 and 100 mu m are 12 and 22, respectively, at a distance of 221.5 mm away from the center of the highly oriented pyrolytic graphite.

引用

页码：256 / 259

页数：4

共 20 条

[1] Curved crystal x-ray optics for monochromatic imaging with a clinical source [J].