Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (4): 40101-040101.doi: 10.11889/j.0253-3219.2016.hjs.39.040101


Mechanical design and experimental test of a remote-controlled quadrupole mover for SINAP FEL projects

WEN Yongmei1,2, WANG Li1, GAO Fei1, SUN Sen1, DONG Yuxi1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangjiang Campus, Shanghai 201204, China;
    2 Donghua University, Shanghai 201620, China
  • Received:2015-12-04 Revised:2016-01-26 Online:2016-04-10 Published:2016-04-08
  • Supported by:

    Supported by National Natural Science Foundation of China(No.Y215501061)


Background: The high position accuracy of the key parts such as the quadrupole magnet relative to the beam center is very important for the Free Electron Laser(FEL) equipment, and will directly affect the quality of the beam. Purpose: This study aims to realize the precise beam-based aligment of the quadrupole by mechanical design of a remote-controlled quadrupole mover.Methods: Beam based alignment(BBA) technique was applied to adjusting the center position of quadrupole with a remote-controlledhigh accuracy mover and its control system. Experimental tests and analysis for the quadrupole mover by the different feedback control were carried out for the undulator segments of the soft X-ray FEL(SXFEL) in Shanghai and the Dalian Coherent Light Source(DCLS) project in China. Results: The positioning accuracy and repeatability error of the quadrupole mover is less than 3μm by the grating ruler feedback control, but it is more than 3μm by the rotary encoder feedback control. Conclusion: The mechanical design and experimental tests of the quadrupole mover areaccomplished. The positioning accuracy and repeatability of the quadrupole mover meet the design indices by the grating ruler feedback control.

Key words: BBA, Aremote-controlled quadrupole mover, Positioning accuracy, Repeatability

CLC Number: 

  • TL53