Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (8): 80103-080103.doi: 10.11889/j.0253-3219.2017.hjs.40.080103


Theoretical simulation and experimental study on double white light interference system

DENG Mingjun1,2,3, WANG Yong1, XUE Chaofan1, TAI Renzhong1   

  1. 1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangjiang Campus, Shanghai 201204, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. ShanghaiTech University, Shanghai 201210, China
  • Received:2017-03-29 Revised:2017-05-09 Online:2017-08-10 Published:2017-08-11
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11225527,No.11475251,No.11275255)

Abstract: Background: To achieve three-dimensional (3D) imaging of general specimen on free electron laser, a device called double-beam 3D imaging device based on single shot free electron laser (FEL) pulse is being built, which will be used on Shanghai soft X-ray FEL. Visible light is planned to adopt on this imaging device for achieving offline space and time alignment. Purpose:This study aims to achieve offline space and time alignment and build an offline alignment system for 3D imaging device based on double-beam white light interference. Methods: Beam splitter prism, charge coupled device and other facilities were used to build this offline alignment system. Based on the wave optics theory, theoretical simulation and verification were performed by MATLAB programming. Results: Space and time alignment was achieved in the double-beam white light interference system. Regulation precision of time alignment was 48.1 fs. Conclusion: After simple improvement, the double-beam white light interference system can be used on 3D imaging device as an offline alignment system in the future.

Key words: FEL, Double-beam, White light interference

CLC Number: 

  • TL11