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TY - CONF AU - Wang, B.C. AU - Du, C.T. AU - Qiu, M.T. AU - Wang, X.W. AU - Wang, Z.M. AU - Wu, L. AU - Xing, Q.Z. AU - Zheng, S.X. ED - Petit-Jean-Genaz, Christine ED - Kim, Dong Eon ED - Kim, Kyung Sook ED - Ko, In Soo ED - Schaa, Volker RW TI - Vibrating Wire Measurements for the XiPAF Permanent Magnet Quadrupoles J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016 C1 - Busan, Korea T2 - International Particle Accelerator Conference T3 - 7 LA - english AB - Vibrating wire technique is a promising measure-ment method for small-aperture Permanent Magnet Quadrupoles (PMQs) in linear accelerators and scan-ning nuclear microprobes. In this paper, we describe the improved vibrating wire setup for measuring an individual PMQ with the minimum aperture of several millimeters. This setup is aiming at measuring the magnetic center. The advantage of this setup is that any mechanical measurement on the wire, which may be the main error source, is avoided. Experiments of the 20 mm-aperture Halbach-type PMQs for Xi'an Proton Application Facility (XiPAF) DTL has been carried out. The research results of the magnetic center measurements show a precision of about 10 μm and robustness against the background magnetic field. Results of the magnetic center and field multipoles measurements agree with the ones obtained from the rotating coil. PB - JACoW CP - Geneva, Switzerland SP - 1124 EP - 1126 KW - multipole KW - background KW - experiment KW - permanent-magnet KW - DTL DA - 2016/06 PY - 2016 SN - 978-3-95450-147-2 DO - 10.18429/JACoW-IPAC2016-TUPMB009 UR - http://jacow.org/ipac2016/papers/tupmb009.pdf ER -