Abstract
The stability of crystal monochromator is the main technical bottleneck of the overall performance of X-ray beam. Generally, in the field of synchrotron radiation, the stability of double crystal monochromator (DCM) is guaranteed by passive vibration control method. In this paper, we propose a new active vibration control method of DCM based on FuLMS-ADRC hybrid algorithm. The angular stability of DCM in the pitch direction is improved from 352.24 nrad to 3.07 nrad (LN2 cooling cycle) by the active vibration control method. This new active vibration control method based on FuLMS-ADRC hybrid algorithm not only provides a new technical scheme to improve the overall performance of hard X-ray beam, but also is of great significance to realize the nano-radian stability index of the fourth-generation synchrotron radiation beam optical equipment.
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