Speaker
Description
Prototypes of storage ring magnets for the Siam Photon Source II (SPS-II), Thailand’s next-generation 3 GeV synchrotron light source, have been successfully developed. The prototype magnets achieved a pole profile accuracy within 20 µm and an assembly accuracy better than 40 µm. The original magnet alignment was performed using mechanical adjustment. Initial magnetic field characterization using a stretched-wire measurement system demonstrated a normalized multipole measurement repeatability within 1E-4. In this work, the magnetic field measurement and fiducialization procedures have been significantly improved through the commissioning of a high-precision measurement facility, enhanced temperature control, improved magnet support design, and the introduction of high-precision alignment grooves for magnet fiducialization. Magnet dimensional inspection and magnetic field measurements have been performed under these improved conditions. The measurement setup, fiducialization methodology, and alignment strategy will be presented, together with an updated evaluation of magnetic performance, fiducialization accuracy, and overall alignment precision for the SPS-II storage ring magnets.
