Calibration and installation of a permanent magnet phase shifter based on nonlinear parameter estimation

Chen Gang; Wen Chunmei; Li Yuhui

doi:10.11884/HPLPB201830.180205

Volume 30 Issue 12

Dec. 2018

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Chen Gang, Wen Chunmei, Li Yuhui. Calibration and installation of a permanent magnet phase shifter based on nonlinear parameter estimation[J]. High Power Laser and Particle Beams, 2018, 30: 125106. doi: 10.11884/HPLPB201830.180205

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Chen Gang, Wen Chunmei, Li Yuhui. Calibration and installation of a permanent magnet phase shifter based on nonlinear parameter estimation[J]. High Power Laser and Particle Beams, 2018, 30: 125106. doi: 10.11884/HPLPB201830.180205

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Calibration and installation of a permanent magnet phase shifter based on nonlinear parameter estimation

doi: 10.11884/HPLPB201830.180205

Chen Gang^{1, 2
,},
Wen Chunmei¹,
Li Yuhui¹

1.
European X-Ray Free-Electron Laser GmbH, Hamburg 22607, Germany
2.
Institute of Computer Application, CAEP, Mianyang 621900, China

Received Date: 2018-07-27
Rev Recd Date: 2018-11-12
Publish Date: 2018-12-15

Abstract

Abstract

For long gap tunable undulator systems in free-electron laser (FEL), phase shifters with high control accuracy are required to ensure that the phases of the radiation field between two adjacent undulators matched with each other.We have studied the impact of control accuracy of phase shifter and analyzed its error sources.This study aims to improve the control accuracy of phase shifters and tries to overcome the shortcomings of the traditional calibration methods, such as complicated calibration procedure and low accuracy manual operations.Based on the improved Gaussian-Newton parameter estimation, this paper proposes an automatic error calibration system for phase shifters, including the preliminary concept and the algorithm.This method has been applied to installing and calibrating all the phase shifters of the European X-ray Free Electron (Euro-XFEL).The control accuracy of each phase shifter reaches micrometer-level in the environment of high magnetic forces, which satisfies the specified engineering design requirements.
- phase shifter,
- control accuracy,
- Gaussian-Newton algorithm,
- nonlinear,
- error compensation

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References(15)

References

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