Bibliographic Citation
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DOI | 10.1107/S0909049507003962 |
Title | High-energy x-ray optics with silicon saw-tooth refractive lenses. |
Creator/Author | Shastri, S. D. ; Almer, J. A. ; Ribbing, C. R. ; Cederstrom, B. C. ; X-Ray Science Division ; Uppsala Univ. ; Royal Inst. of Tech. |
Publication Date | 2007 Jan 01 |
OSTI Identifier | OSTI ID: 914913 |
Report Number(s) | ANL/XSD/JA-58329 |
DOE Contract Number | DE-AC02-06CH11357 |
Other Number(s) | Journal ID: ISSN 0909-0495; JSYRES; TRN: US200817%%157 |
Resource Type | Journal Article |
Resource Relation | Journal: J. Synchrotron Radiat.; Journal Volume: 14; Journal Issue: 2007 |
Research Org | Argonne National Laboratory (ANL) |
Sponsoring Org | SC; Swedish Foundation for Strategic Research; Swedish Research Council |
Subject | 43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; FOCUSING; GEOMETRY; KEV RANGE; LENSES; OPTICS; PERFORMANCE; PHOTONS; RADIATIONS; SCATTERING; SILICON; THICKNESS; WIGGLER MAGNETS |
Description/Abstract | Silicon saw-tooth refractive lenses have been in successful use for vertical focusing and collimation of high-energy X-rays (50-100 keV) at the 1-ID undulator beamline of the Advanced Photon Source. In addition to presenting an effectively parabolic thickness profile, as required for aberration-free refractive optics, these devices allow high transmission and continuous tunability in photon energy and focal length. Furthermore, the use of a single-crystal material (i.e. Si) minimizes small-angle scattering background. The focusing performance of such saw-tooth lenses, used in conjunction with the 1-ID beamline's bent double-Laue monochromator, is presented for both short ({approx}1:0.02) and long ({approx}1:0.6) focal-length geometries, giving line-foci in the 2 {micro}m-25 {micro}m width range with 81 keV X-rays. In addition, a compound focusing scheme was tested whereby the radiation intercepted by a distant short-focal-length lens is increased by having it receive a collimated beam from a nearer (upstream) lens. The collimation capabilities of Si saw-tooth lenses are also exploited to deliver enhanced throughput of a subsequently placed small-angular-acceptance high-energy-resolution post-monochromator in the 50-80 keV range. The successful use of such lenses in all these configurations establishes an important detail, that the pre-monochromator, despite being comprised of vertically reflecting bent Laue geometry crystals, can be brilliance-preserving to a very high degree. |
Country of Publication | United States |
Language | ENGLISH |
Format | Size: 204-211 |
System Entry Date | 2008 Sep 29 |
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