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TY - CONF AU - Sunwong, P. AU - Boonwanna, B. AU - Chaichuay, S. AU - Klysubun, P. AU - Kwankasem, A. AU - Preecha, C.P. AU - Sooksrimuang, V. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - Design and Fabrication of a Combined Function Magnet Prototype for Siam Photon Source J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - A prototype of combined function magnet has been developed for a new facility of Siam Photon Source (SPS). The magnet is a combined dipole and quadrupole with the required dipole field and quadrupole gradient of 0.6 T and 30 T/m, respectively. The high field gradient is attained from an offset quadrupole design pioneered by the European Synchrotron Radiation Facility (ESRF). The prototype magnet is fabricated and tested in-house. Magnetic field quality is characterized by the field homogeneity in the central field region and multipole components of the magnetic field. Calculated results show that the gradient deviation and the normalized multipole error are less than 0.01 within the good field region of ±8 mm. Preliminary measurements show a good agreement with the calculation, although further measurements are required to verify the results and the multipole error of magnetic field. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3466 EP - 3468 KW - quadrupole KW - simulation KW - dipole KW - multipole KW - synchrotron DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-THPAK100 UR - http://jacow.org/ipac2018/papers/thpak100.pdf ER -