Studies on Focusing Performances of the Bent Crystal Monochromator

Zheng Wenli; Jiang Xiaoming; Wu Jiayang; Jing Yuhui; Liu Gongchun

Chinese Physics C> 1995, Vol. 19> Issue(9) : 858-864

Studies on Focusing Performances of the Bent Crystal Monochromator

Institute of High Energy Physics , The Chinese Academy of Sciences , Beijing,100039

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Abstract：
The triangular crystal is used as monochromator on 4W1C beamline at Beijing Synchrotron Kadiation Facility. Three crystals of Si(111), Si(220) and Si(422) with an oblique-cut angle of 12.16° are employed at the same Bragg angle 23.65°to select monochromatic X-rays with wavelengths of 0.252nm, 0.154nm and 0.089nm,respectively. The triangular crystal is bent to a cylindrical shape to focus the beam in the horizontal direction and to provide focusing monochromatic X-rays for the diffuse scattering station. The theoretic calculations and SHADOW ray-tracing of the optical system are in good agreement with the experimental results.

References

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Winick,S.Doniach,Synchrotron Radiation Research,Plenum Press,NewYork,（1980）.[2] J.R.Helliwell et al,J.Phys,E15（1982）1363.[3] N.Sakabe,J.Appl.Cryst,16（1983）542.[4] Y.Amemiya,K.Wakabayashi,T.Hamanaka,et al,Nucl.Instr,Methods 208（1983）471.[5] R.Caciuff,S.Melone.F.Rustichelli,A.Boeuf,Physics Reports（Rev Section of Physics Letters）,152（1987）26.[6] H.Toleutino,E.Dartyge et al.,J.Appl.Cryst.,21（1988）15.[7] Bob Batterman,Ken Finkelstein,Sarrjit Shastri,CHESS Activity Report.（Winter1993）.[8] Y.Jing et al,Rev.Sci.Instrum.,63（1992）1077.[9] X.Jiang,Y.Fang,D.Liu,D.Xian,Proceedings of the Interantional Conferenceon Synchrotron Radiation Applications.（USTCPress,1990）409.[10] B.Lai,F.Cerrina,Nucl.Instr.and Meth.,A246（1986）337.[11] G.Rosenbaum.K.C.Holmes,in Synchrotron Rodiation Reserch,edited byH.WinickandS.Doniach,Plenum Press,NewYork,（1980）P533.[12] B.E.Warren,X-ray Diffraction,Addison-Wesley,Reading,Mass,（1969）353.

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Zheng Wenli, Jiang Xiaoming, Wu Jiayang, Jing Yuhui and Liu Gongchun. Studies on Focusing Performances of the Bent Crystal Monochromator[J]. Chinese Physics C, 1995, 19(9): 858-864.

Zheng Wenli, Jiang Xiaoming, Wu Jiayang, Jing Yuhui and Liu Gongchun. Studies on Focusing Performances of the Bent Crystal Monochromator[J]. Chinese Physics C, 1995, 19(9): 858-864. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Studies on Focusing Performances of the Bent Crystal Monochromator

Corresponding author: Zheng Wenli,

Institute of High Energy Physics , The Chinese Academy of Sciences , Beijing,100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1995-09-05

Abstract: The triangular crystal is used as monochromator on 4W1C beamline at Beijing Synchrotron Kadiation Facility. Three crystals of Si(111), Si(220) and Si(422) with an oblique-cut angle of 12.16° are employed at the same Bragg angle 23.65°to select monochromatic X-rays with wavelengths of 0.252nm, 0.154nm and 0.089nm,respectively. The triangular crystal is bent to a cylindrical shape to focus the beam in the horizontal direction and to provide focusing monochromatic X-rays for the diffuse scattering station. The theoretic calculations and SHADOW ray-tracing of the optical system are in good agreement with the experimental results.