Journal of Synchrotron Radiation (Sep 2024)

Vibrational stability improvement of a mirror system using active mass damping

  • Shijing He,
  • Haoran Yuan,
  • Tianyu Wu,
  • Nuo Chen,
  • Xinyu Zhang,
  • Zhizhuo Wang,
  • Xuerong Liu,
  • Fang Liu

DOI
https://doi.org/10.1107/S1600577524006490
Journal volume & issue
Vol. 31, no. 5
pp. 1126 – 1133

Abstract

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Addressing the demand for high stability of beamline instruments at the SHINE facility, a high stability mirror regulating mechanism has been developed for mirror adjustments. Active mass damping was adopted to attenuate pitch angle vibrations of mirrors caused by structural vibrations. An internal absolute velocity feedback was used to reduce the negative impact of spillover effects and to improve performance. The experiment was conducted on a prototype structure of a mirror regulating mechanism, and results showed that the vibration RMS of the pitch angle was effectively attenuated from 47 nrad to 27 nrad above 1 Hz.

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