Design of Two-Dimention Interferometer for Measuring Electron Beam Transverse Sizes

Abstract:

On electron synchrotron, beam profile and transverse sizes are usually measured by SR (synchrotron radiation) light that is radiated by electron beam at bending magnets of synchrotron. In the upgrade project of HLS (Hefei Light Source), the designed horizontal and vertical beam transverse sizes are 0.127mm and 0.06mm respectively, the SR interferometer must be developed at HLS to measure these smaller electron sizes. To avoid the chromatic aberration of the lens, we designed the reflective SR interferometer based on off axis parabolic mirror instead of objective lens. And we used the quad-aperture instead of the double-aperture to design two-dimention SR interferometer. In this paper, design of the optical configuration of two-dimention SR interferometer and basic theory for the measurement of small beam sizes by two-dimention SR interferometer will be presented firstly, and then the two-dimention interferogram will be simulated. Lastly, processing algorithm of interference image will be introduced, and some factors effect on result will be analyzed.

• Periodical: Advanced Materials Research (Volumes 403-408)
• Pages: 2732-2735
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.403-408.2732
• Online since: November 2011
• Authors: Lei Lei Tang, Bao Gen Sun, Ping Lu, Ji Gang Wang, Li Ming Gu, Yun Yun Xiao
• Keywords: Electron Beam Transverse Sizes, Measurement, Simulation, SR Light, Two-Dimention Interferometer

References

[1] T. Mitsuhashi, Beam Profile and Size Measurement by SR Interferometer, in Beam Measurement, Proceedings of Joint US-CERN-Japan-Russia School on Particle Accelerators, Montreux, Switzerland, May 11-20, 1998, pp.339-427.

[2] B.G. Sun, P. Zheng, et al., Development of New Beam Profile and Emittance Measurement System for HLS, High Energy Physics and Nuclear Physics, Aug. 2006, vol. 30, no. 8, p.792.

[3] M. Masaki and S. Takano, Beam Size Measurement of the Spring-8 Storage Ring by Two-Dimensional Interferometer, Proceedings of Beam Diagnostics and Instrumentation for Particle Accelerator, Grenoble, France, May 13-15, 2001, pp.142-144.

[4] M. Born and E. Wolf, Principles of Optics, 5th ed., Pergamon Press, Oxford, 1975, chapter 7-10.

[5] L.L. Tang, B.G. Sun, et al., Application of the GigE Vision Digital Camera for Beam Diagnostics in HLS, Proceedings of the International Particle Conference, Kyoto, Japan, May 23-28, 2010, pp.1041-1043.