Speaker
Description
A sustainability-oriented cryogenic permanent magnet undulator, the LN₂-enabled C³-CPMU, has been success-fully demonstrated at the Taiwan Photon Source (TPS). The system is designed to address cryogenic performance, thermal stability, and cost efficiency for high-current storage ring operation (up to 500 mA). The undulator employs a conduction-cooled architecture combined with an LN₂ reservoir-based cooling scheme with simplified flow and pressure control, eliminating the need for dedi-cated cryogenic units. Operating at an intermediate tem-perature of 150–160 K, the system consumes approxi-mately 8 L/h of LN₂. Active temperature control main-tains the magnet temperature within ± 0.08 K under vary-ing beam conditions, ensuring stable magnetic field per-formance. The enhanced magnetic properties at cryogenic temperatures enable shorter undulator periods, while integration with existing facility LN₂ infrastructure sig-nificantly reduces system complexity and operational overhead. These results demonstrate a scalable and ener-gy-efficient solution for next-generation synchrotron and XFEL light sources.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted. |
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