A New Optics for Dark-Field Imaging in X-Ray Region `Owl'
A New Optics for Dark-Field Imaging in X-Ray Region `Owl'
复制标题
X 射线区域“猫头鹰”暗场成像的新型光学器件
DOI：
10.1143/jjap.40.l844
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发表时间：
2001
影响因子：
1.5
通讯作者：
Xi Xiaowei
中科院分区：
文献类型：
--
作者：
M. Ando;H. Sugiyama;A. Maksimenko;W. Pattanasiriwisawa;K. Hyodo;Zhang Zhang;Xi Xiaowei
本文提出了一种用于X射线暗场成像的X射线光学系统--“Owl”。它包括一个非对称单色器和一个单片X射线光学系统，该系统包括一个准直器C和一个分析器A。C和A具有4，4，0衍射，厚度为1.08 mm±10 µm。使用的X射线能量为35 keV。这些衍射的角宽约为0.3 µrad。分析仪A只接受位于C和A之间的样品S的折射成分，同时消除直的成分而不与其反应。两个样品，一个是含有直径为300 µm的硼纤维的铝基质，另一个是含有模拟乳腺癌的尼龙纤维的蜡块，显示出非常清晰的纤维成像，通常用传统的X射线技术看不到。
An X-ray optics for X-ray dark-field imaging named `Owl' is proposed. It involves an asymmetric monochromator and a monolithic X-ray optics comprising a collimator C and an analyzer A. The C and A have 4,4,0 diffraction and thickness of 1.08 mm±10 µm. The X-ray energy used was 35 keV. These diffractions have an angular width of approximately 0.3 µrad. The analyzer A accepts only the refracted component from a sample S which is located between C and A, while eliminating the straight component without reacting with it. Two samples, one Al matrix containing boron fibers of 300 µm diameter and the other a wax block containing a nylon fiber simulating breast cancer, show very clear fiber imaging usually not visible by the conventional X-ray technique.