MEDSI2025 - 13th International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation

Thermal analysis and design optimization of a DCM for Korea-4GSR based on PLS-II benchmarking

THP56

18 Sept 2025, 16:20

1h 10m

Poster Session Room (The Loop)

Poster Presentation Thermal Poster Session 3

Speaker

Jinjoo Ko (Korea Basic Science Institute)

Description

The Korea fourth-generation storage ring (Korea-4GSR) is scheduled for construction in Ochang, Cheongju, Chungbuk by 2029. Designed with a significantly lower emittance of 60 pm·rad and higher storage ring energy of 4 GeV compared to PLS-II, Korea-4GSR is expected to extend the capabilities of beamline experiments by providing photon beams with enhanced brightness and coherence. However, the thermal impact of such high-intensity beams on beamline optical components must be carefully evaluated. In particular, we conducted a benchmark study at the PLS-II beamline to analyze the heat load on the first crystal of the double-crystal monochromator (DCM) in a hard X-ray beamline. Based on the benchmark results, this study presents a comprehensive thermal analysis of the Korea-4GSR DCM, evaluates its impact on photon beam performance, and proposes an improved design to mitigate thermal distortions.