Theoretical Study of the Two-Dimensional Point Focusing by Two Multilayer Laue Lenses.

Yan, H. ; Maser, J. ; Macrader, A. ; Stephenson, R.

Technical Information Center Oak Ridge Tennessee

关键词: Laue method;    Lenses;    Accuracy;    Alignment;    Diffraction;   

RP-ID  :  DE2008939946

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Hard x-ray point focusing by two crossed multilayer Laue lenses is studied using a full-wave modeling approach. This study shows that for a small numerical aperture, the two consecutive diffraction processes can be decoupled into two independent ones in respective directions. Using this theoretical tool, we investigated adverse effects of various misalignments on the 2D focus profile and discussed the tolerance to them. We also derived simple expressions that described the required alignment accuracy.