A rotary mechanism for eliminating the twist of bent crystal

Yang Jiaowang; Liu Xu; Cao Gang; Cai Quan; Sheng Weifan

doi:10.11884/HPLPB201931.190046

Volume 31 Issue 9

Sep. 2019

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Article Navigation > High Power Laser and Particle Beams > 2019 > 31(9): 091003

Yang Jiaowang, Liu Xu, Cao Gang, et al. A rotary mechanism for eliminating the twist of bent crystal[J]. High Power Laser and Particle Beams, 2019, 31: 091003. doi: 10.11884/HPLPB201931.190046

Citation:

Yang Jiaowang, Liu Xu, Cao Gang, et al. A rotary mechanism for eliminating the twist of bent crystal[J]. High Power Laser and Particle Beams, 2019, 31: 091003. doi: 10.11884/HPLPB201931.190046

Yang Jiaowang, Liu Xu, Cao Gang, et al. A rotary mechanism for eliminating the twist of bent crystal[J]. High Power Laser and Particle Beams, 2019, 31: 091003. doi: 10.11884/HPLPB201931.190046

Citation:

Yang Jiaowang, Liu Xu, Cao Gang, et al. A rotary mechanism for eliminating the twist of bent crystal[J]. High Power Laser and Particle Beams, 2019, 31: 091003. doi: 10.11884/HPLPB201931.190046

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A rotary mechanism for eliminating the twist of bent crystal

doi: 10.11884/HPLPB201931.190046

Yang Jiaowang^{1, 2
,},
Liu Xu¹,
Cao Gang^{1, 2},
Cai Quan^{1
,
,},
Sheng Weifan^{1, 2
,
,}

1.
Institute of High Energy Physics, Chinese Acadeny of Sciences, Beijing 100049, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2019-05-15
Rev Recd Date: 2019-06-02
Publish Date: 2019-09-15

Abstract

Abstract

Laue crystal monochromator are commonly used to monochromate high-energy X-rays (above 50 keV). Through bending the thin crystal, focused monochromatic beams could be obtained. However, twisted deformation would inevitably occur during bending crystal, which seriously affects monochromator efficiency. In this paper, wave optics simulation method was applied to study the influence of the bent crystal twisted on the performance of the Laue crystal monochromator. Moreover, in order to eliminate the crystal twist, a rotary mechanism of rotation angle fine adjustment was designed. The rotary mechanism includes a series of flexure hinges arranged symmetrically. Furthermore, the dynamics performances of the mechanism were also analyzed by using finite element method. The results show that when the rotation angle was within ±2°, the maximum shift of rotation center was less than 20 μm, the angular resolution achieved less than 1″ and dynamic range was up to 10⁴, which totally meet the design requirements.
- Laue crystal monochromator,
- optical simulation,
- rotary mechanism,
- flexure hinge,
- bending mechanism

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References(14)

References

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