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In 2022, a collaborative team led by Pohang Accelerator Laboratory, Seoul National University and Kangwon National University began the development of a 5 T metal-insulated high-temperature superconducting (HTS) wavelength shifter (WLS) magnet, aiming to enhance the brilliance of photons by 1,000 times at 100 keV in Pohang Light Source II. In 2023, we reported test results of the magnet in a vertical conduction cooling machine, where it successfully reached its full field of 5 T twice without any visible obstacles.
To enable installation in an actual particle accelerator, we completed the fabrication and assembly of WLS magnet in a dedicated horizontal conduction cooling machine with cryogenic beampipe. Here we report technical challenges faced during the assembly and test of the WLS magnet system. After that, we present test results of the WLS magnet in a dedicated cryostat including initial cooling results, analysis of temperature and voltage during current operation, and field integral measurements obtained using a 3D PCB search coil. The progress made since 2022 and our plan for the installation of the magnet in an actual particle accelerator will be presented.
This research was supported in part by National R&D Program through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2022M3I9A1072846 and 2022M3I9A1073808), in part by the Applied Superconductivity Center, Electric Power Research Institute of Seoul National University. This research was conducted by support program for Kangwon High Magnetic Field Research Center through the Gangwon Technopark(GWTP) funded by Gangwon Province.
