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TY - CONF AU - Park, K.-H. AU - Jung, Y.-G. AU - Kim, D.E. AU - Kim, S.N. AU - Ko, I.S. AU - Lee, B.H. AU - Lee, H.-G. AU - Lee, M.S. AU - Lee, S.B. AU - Suh, H.S. AU - Sung, C.W. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Field Measurement Facility for PAL-XFEL Undulators J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Pohang Accelerator Laboratory (PAL) is developing the SASE based FEL for X-ray coherent photon sources. The PAL developed the prototype undulator that was 5.0 m magnetic length. The PAL has constructed the undulator field measurement facility to confirm the field qualities of the XFEL undulators in the assembly building. The temperature stability of the measurement rooms was controlled within ±0.1°C. Two field measurement benches that included Hall probe scan, flip coil and stretched wire system were installed and evaluated their performances. The field profile of the prototype undulator was characterized and shimmed using the installed measurement system. This paper described the field measurement facility with the performance test results of the two benches. PB - JACoW CP - Geneva, Switzerland SP - 2032 EP - 2034 KW - undulator KW - controls KW - FEL KW - laser KW - software DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-WEPRO040 UR - http://jacow.org/ipac2014/papers/wepro040.pdf ER -