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Title:
Short focal length Kirkpatrick-Baez mirrors for a hard x-ray nanoprobe
Authors:
Liu, Wenjun; Ice, Gene E.; Tischler, Jonathan Z.; Khounsary, Ali; Liu, Chian; Assoufid, Lahsen; Macrander, Albert T.
Affiliation:
AA(Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 and University of Illinois at Urbana-Champaign, Urbana, Illinois 61801), AB(Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831), AC(Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831), AD(Argonne National Laboratory, Argonne, Illinois 60439), AE(Argonne National Laboratory, Argonne, Illinois 60439), AF(Argonne National Laboratory, Argonne, Illinois 60439), AG(Argonne National Laboratory, Argonne, Illinois 60439)
Publication:
Review of Scientific Instruments, Volume 76, Issue 11, pp. 113701-113701-6 (2005). (RScI Homepage)
Publication Date:
11/2005
Origin:
AIP
PACS Keywords:
X- and gamma-ray sources, mirrors, gratings, and detectors, X-ray beams and x-ray optics, Synchrotron radiation instrumentation
Abstract Copyright:
(c) 2005: American Institute of Physics
DOI:
10.1063/1.2125730
Bibliographic Code:
2005RScI...76k3701L

Abstract

We describe progress in the fabrication of short-focal-length total-external-reflection Kirkpatrick-Baez x-ray mirrors with ultralow figure errors. The short focal length optics produce nanoscale beams (<100 nm) on conventional (~64 m long) beamlines at third generation synchrotron sources. The total-external reflection optics are inherently achromatic and efficiently focus a white (polychromatic) or a tunable monochromatic spectrum of x rays. The ability to focus independent of wavelength allows novel new experimental capabilities. Mirrors have been fabricated both by computer assisted profiling (differential polishing) and by profile coating (coating through a mask onto ultra-smooth surfaces). A doubly focused 85×95 nm2 hard x-ray nanobeam has been obtained on the UNICAT beamline 34-ID at the Advanced Photon Source. The performance of the mirrors, techniques for characterizing the spot size, and factors limiting focusing performance are discussed.
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Database: Astronomy
Physics
arXiv e-prints