17–22 May 2026
C.I.D
Europe/Zurich timezone

Improvement and Optimization of a Permanent-Magnet Phase Shifter

TUP7704
19 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC7.T15: Technology: Undulators and Wigglers Poster session

Speaker

Chin-Kang Yang (National Synchrotron Radiation Research Center)

Description

A permanent-magnet (PM) phase shifter for phase matching between tandem elliptically polarizing undulators (EPUs) at the Taiwan Photon Source (TPS) has been developed, and its initial version has already been installed in the storage ring. Current efforts focus on improving the device by enhancing the mechanical precision of the gap-adjustment system, maintaining magnetic-field quality, and minimizing beam-orbit perturbations within the limited installation space. Magnet sorting and shimming techniques were used to refine the magnetic performance of the first version.

At small operating gaps, strong magnetic forces introduce substantial mechanical loading and can affect the field directionality. To overcome this limitation, an upgraded design incorporating a spring-assisted mechanism is under development. This work presents the optimization approach and the resulting improvements achieved through the integration of the spring system, demonstrating enhanced structural stability and improved reproducibility under high-force operating conditions.

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Authors

Chih-Sheng Yang (National Synchrotron Radiation Research Center) Chin-Kang Yang (National Synchrotron Radiation Research Center)

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