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Description
This work presents the development status of a high-temperature superconducting (HTS) wavelength shifter magnet, a collaborative effort by Pohang Accelerator Laboratory (PAL) and Seoul National University (SNU). The device employs a pure HTS coil system with a conduction-cooled, cryogen-free cryostat, designed to achieve stable operation at 5 T. Following the completion of the vacuum chamber and cooling infrastructure, the magnet successfully demonstrated its target field strength in cold tests after iterative improvements to the coil and thermal insulation. We are currently preparing in-vacuum field measurements and long-term electrical stability tests to validate its suitability for accelerator operation. Beam tests at PLS-II is scheduled to determine whether the device is compatible with accelerator operation, marking an accelerator-based experiment using a fully HTS coil-type insertion device.
