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TY - CONF AU - Wang, M.W. AU - Guan, X. AU - Ma, P.F. AU - Qiu, M.T. AU - Wang, D. AU - Wang, X.W. AU - Wang, Z.M. AU - Zheng, S.X. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - A Rotation Method to Calibrate BPM Electric Offsets J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Beam position monitor is a key instrument for machine commissioning. To measure beam position accurately, offline calibrations to acquire the sensitivity and offsets of the BPM are essential prerequisites. A new method to calibrate the BPM electric offset is proposed in this paper. By measuring the location variation of the BPM electric center after rotatingtheBPM180degrees, theBPMoffsetcanbederived. The method is more convenient, universal and accurate than the traditional methods. The method is successfully applied to calibrate the button BPM of Xi’an Proton Application Facility. The repetitive measurement error is 20.8 um. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2595 EP - 2597 KW - laser KW - site KW - radiation KW - instrumentation KW - proton DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW052 UR - http://jacow.org/ipac2019/papers/wepgw052.pdf ER -