Design and simulation of interferometer for synchrotron radiation beam size measurement

Sun Liangwei; Luo Qing

doi:10.11884/HPLPB202133.210236

Volume 33 Issue 8

Aug. 2021

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Article Navigation > High Power Laser and Particle Beams > 2021 > 33(8): 084002

Zhang Yang, Wang Xianghui, Zhang Jie, et al. Comparison of two discontinuous spectral element methods[J]. High Power Laser and Particle Beams, 2018, 30: 023004. doi: 10.11884/HPLPB201830.170169

Citation:

Sun Liangwei, Luo Qing. Design and simulation of interferometer for synchrotron radiation beam size measurement[J]. High Power Laser and Particle Beams, 2021, 33: 084002. doi: 10.11884/HPLPB202133.210236

Zhang Yang, Wang Xianghui, Zhang Jie, et al. Comparison of two discontinuous spectral element methods[J]. High Power Laser and Particle Beams, 2018, 30: 023004. doi: 10.11884/HPLPB201830.170169

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Design and simulation of interferometer for synchrotron radiation beam size measurement

doi: 10.11884/HPLPB202133.210236

Sun Liangwei,
Luo Qing^,

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

Received Date: 2021-06-15
Rev Recd Date: 2021-08-08

Available Online: 2021-08-17

Publish Date: 2021-08-15

Abstract

Abstract

The interferometric measurement of the transverse beam size based on synchrotron radiation is a non-intercepting high precision measurement method. Compared with the imaging method, the interferometric method can measure smaller beam size and get better resolution. It is expected to obtain submicron resolution at shorter measurement wavelength, so it is widely used in synchrotron radiation sources. The upgraded scheme of current interference device in Hefei Light Source HLS-II is presented in this paper. It is proposed to replace the first focusing lens in the original interference light path with an RC structure focusing mirror, and the second single lens with a doublet lens. The design goal of this paper is to reduce dispersion and geometric aberration without changing the optical axis of the optical path, so as to improve the imaging quality of the optical path. The geometrical optical path design is used to evaluate the imaging quality of the optical path, and physical optical simulation is performed to obtain the interference fringes of the measurement system. The simulation results show that the radius of Airy spot is reduced by about 35%, the root mean square radius of dot array is reduced by about 99%, the wavefront difference is reduced by about 75%, and the cutoff frequency of MTF function is increased by about 65%, using a focusing mirror to replace the original focusing lens can greatly improve the image quality of the optical path.
- synchrotron radiation,
- interferometer,
- RC focusing mirror,
- transverse beam size,
- optical design

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References(19)

References

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