Table of Contents
X-Ray Optics and Instrumentation
Volume 2010 (2010), Article ID 784732, 9 pages
http://dx.doi.org/10.1155/2010/784732
Research Article

Elliptically Bent X-Ray Mirrors with Active Temperature Stabilization

1Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
2Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
3Ikawamachi Board of Education, Minamiakitagun, Akitaken 018-1516, Japan
4Helmholtz Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY-II, Albert-Einstein-Str. 15, 12489 Berlin, Germany

Received 30 January 2010; Accepted 9 July 2010

Academic Editor: Ali Khounsary

Copyright © 2010 Sheng Yuan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present details of design of elliptically bent Kirkpatrick-Baez mirrors developed and successfully used at the advanced light source for submicron focusing. A distinctive feature of the mirror design is an active temperature stabilization based on a Peltier element attached directly to the mirror body. The design and materials have been carefully optimized to provide high heat conductance between the mirror body and substrate. We describe the experimental procedures used when assembling and precisely shaping the mirrors, with special attention paid to laboratory testing of the mirror-temperature stabilization. For this purpose, the temperature dependence of the surface slope profile of a specially fabricated test mirror placed inside a temperature-controlled container was measured. We demonstrate that with active mirror-temperature stabilization, a change of the surrounding temperature by more than 3 K does not noticeably affect the mirror figure. Without temperature stabilization, the rms slope error is changed by approximately 1.5 μrad (primarily defocus) under the same conditions.