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TY - CONF AU - Huang, J.C. AU - Chang, C.H. AU - Hwang, C.-S. AU - Kitamura, H. AU - Mizumoto, S. M. AU - Yang, C.K. AU - Yang, C.S. ED - Schaa, Volker RW ED - Tavakoli, Keihan ED - Tilmont, Manuel TI - A Mechanical Undulator Frame to Minimize Intrinsic Phase Errors J2 - Proc. of MEDSI2018, Paris, France, 25-29 June 2018 C1 - Paris, France T2 - Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation T3 - 10 LA - english AB - A PrFeB-based cryogenic permanent magnet undu-lator (CPMU) is under construction at the Taiwan Photon Source (TPS) to generate brilliant X-rays. When magnets are cooled to 77 K, a CPMU with a period length of 15 mm can generate an effective magnetic field of 1.32 T in a gap of 4 mm. A main feature of the TPS CPMU is its low-intrinsic-phase errors by the installation of force-compensation modules on the out-of-vacuum girders in a four-support-points configuration. Moreover, adjusting the spring settings one can obtain very low undulator phase errors. In this paper, a mechanical frame design for the TPS-CPMU with force-compensating spring modules will be discussed. Observations of deformation effects of the out-of-vacuum girders on the CPMU will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 69 EP - 71 KW - vacuum KW - operation KW - undulator KW - GUI KW - permanent-magnet DA - 2018/12 PY - 2018 SN - 978-3-95450-207-3 DO - 10.18429/JACoW-MEDSI2018-TUPH19 UR - http://jacow.org/medsi2018/papers/tuph19.pdf ER -