Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (1): 1-4 doi: 10.13538/j.1001-8042/nst.20.1-4

• SYNCHROTRON TECHNOLOGY AND APPLICATIONS •     Next Articles

Improvement on a Michelson interferometer for bunch length measurement of a femtosecond accelerator

LIN Xuling1,2,* ZHANG Jianbing1 BEI Hua1,2 DAI Zhimin1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China
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LIN Xuling, ZHANG Jianbing, BEI Hua, DAI Zhimin. Improvement on a Michelson interferometer for bunch length measurement of a femtosecond accelerator.Nuclear Science and Techniques, 2009, 20(1): 1-4     doi: 10.13538/j.1001-8042/nst.20.1-4

Abstract:

Based on the femtosecond accelerator facility at Shanghai Institute of Applied Physics (SINAP), a conventional far-infrared Michelson interferometer was built to measure the bunch length by means of optical autocorrelation. However, according to the preliminary experiment result, the resolution of interferometer is not good enough, because the mirror-driving mechanism makes the moving mirror tend to tilt or wobble as it retards. Considering of the allowable errors, we calculate the maximum allowable titling angle of the moving mirror, and discuss the alignment plan in this paper.

Key words: Coherent transition radiation, Bunch length, Interferometer, Dynamic alignment