Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation

HU Wen; XIE Hong-Lan; DU Guo-Hao; XIAO Ti-Qiao

Chinese Physics C> 2007, Vol. 31> Issue(6) : 597-601

Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation

Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, CAS, Shanghai 201800, China

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Abstract：
A new optical configuration of monochromator for X-ray imaging beamline, which allows one to obtain a parallel monochromatic beam with fixed exit by using two asymmetrically cut bent-crystals in Laue geometry, has been proposed. Based on the W14 multi-pole wiggler at SSRF, a preliminary design for the monochromator has been presented. The tunable photon energy range is 19—120keV, the flux output and flux density is 1.9×10¹³phs/s@33keV and 3.8×10¹⁰phs/s/mm²@33keV respectively. The flux and energy resolution of the monochromator is estimated, which indicates that the heat-load is tolerable and the design meets the demands of the X-ray imaging experiments. The results show that the new configuration of monochromator, compared with traditional design in double flat-crystal, is more powerful in dealing with the high flux and high heat-load.

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. ZHONG Z et al. J. Appl. Cryst, 2001 , 34: 504-5092. REN B, Dilmanian F A, Chapman L D et al. Nucl. Instrum.Methods, 1999, A428: 528-5503. Suortti P, Fiedler S, Bravin A et al. J. Synchrotron Rad.,2000, 7: 340-3474. ZHONG Z, Chapman D et al. Phys. Med. Biol., 1997, 42:1751-17625. ZHONG Z, Chapman D et al. J. Synchrotron Rad., 1999,6: 212-2146. Suortti P, Thomlinson W. Nucl. Instrum. Methods, 1988,A269: 639-6487. Suortti P, Lienert U, Schulze C. AIP Conf. Proc., 1997,389: 175-1928. Erola E, Etelaniemi V, Suortti P et al. J. Appl. Cryst, 1990,23: 35-429. Suortti, Fiedler P, Bravin S et al. J. Synch. Rad., 2000, 7:340-34710. Thomlinson W. Proceedings of the International School ofPhysics `Enrico Fermi', Course CXXVIII. Ed Burattini E,Balerna A. Amsterdam: IOS Press, 1996. 127-153

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HU Wen, XIE Hong-Lan, DU Guo-Hao and XIAO Ti-Qiao. Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation[J]. Chinese Physics C, 2007, 31(6): 597-601.

HU Wen, XIE Hong-Lan, DU Guo-Hao and XIAO Ti-Qiao. Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation[J]. Chinese Physics C, 2007, 31(6): 597-601. shu

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Received: 2006-09-27
Revised: 2006-11-21

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation

Corresponding author: HU Wen,

Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, CAS, Shanghai 201800, China

Received Date: 2006-09-27
Accepted Date: 2006-11-21
Available Online: 2007-06-05

Abstract: A new optical configuration of monochromator for X-ray imaging beamline, which allows one to obtain a parallel monochromatic beam with fixed exit by using two asymmetrically cut bent-crystals in Laue geometry, has been proposed. Based on the W14 multi-pole wiggler at SSRF, a preliminary design for the monochromator has been presented. The tunable photon energy range is 19—120keV, the flux output and flux density is 1.9×10¹³phs/s@33keV and 3.8×10¹⁰phs/s/mm²@33keV respectively. The flux and energy resolution of the monochromator is estimated, which indicates that the heat-load is tolerable and the design meets the demands of the X-ray imaging experiments. The results show that the new configuration of monochromator, compared with traditional design in double flat-crystal, is more powerful in dealing with the high flux and high heat-load.

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Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation

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Double Laue-Crystal Monochromator for an X-Ray Imaging Beamline with Synchrotron Radiation

Corresponding author: HU Wen,

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