Power supply and quench protection system for a superconducting 7.5 tesla wiggler

The Budker Institute of Nuclear Physics has a large experience in manufacturing superconducting magnets, including wigglers (special insertion devices) which are installed in straight sections of storage rings for increasing the photon flux or for improving the spectral features of the synchrotron radiation. The article describes the power supply and the quench protection system for a 7.5 T superconducting wiggler, produced for the new SR source PLS in Korea. The power supply and the quench protection system for the 7.5 T superconducting wiggler are described. The experimental measurements of the quench history and the training effect are presented. An output energy to a dumping resistance during quenching and a dumped energy inside the yoke are estimated.