Performance of cryogenic permanent magnet undulators at Taiwan Photon Source
Jui-Che Huang1*, Chin-Kang Yang1, Chih-Sheng Yang1, Chih-Wei Chen1, Ching-Shiang Hwang1
1Magnet group, National Synchrotron Radiation Research Center, Hsin-Chu City, Taiwan
* Presenter:Jui-Che Huang,
A PrFeB-based CPMU (period length 15mm) has been constructed for the Taiwan Photon Source (TPS) to provide high brilliant X-rays. The main development goals of the TPS-CPMU are to achieve low-intrinsic-phase errors and high thermal stability against external heat loads. At the lowest PM temperature of 56 K, the CPMU can generate an effective magnetic field of 1.34 T in a gap of 4 mm. An in-situ and vacuum compatible field measurement system has been developed to characterize the magnetic fields at cryogenic temperatures and allowing corrections of gap errors. In this paper, the relevant technology and performance of the TPS-CPMU will be discussed .

Keywords: Undulator, X-ray, permanent magnet, Taiwan Photon Source