The Cut Disk Structure (CDS) has been proposed for high energy linacs as an accelerating structure with high coupling coefficient. This structure was studied for applications both in proton and electron linear accelerators. An important point for the stable structure operation is a cool- ing capability. Real 3D thermal stress analysis has been performed by coupled simulations with MAFIA and AN- SYS codes. For this purpose a special interface code was developed. The temperature and thermal stress distribu- tions, operating and coupling modes frequency shifts for different operating regimes and coolingschemes were stud- ied. Results of the study are presented. For moderate and high heat loading the drift tube region is necessary. Spe- cial coupling windows shape is proposed to simplify CDS cooling for operation with high (more than 15 kW/m) heat loading.
The paper describes a 3‑D thermal‑stress analysis of the Cut Disk Structure (CDS), an accelerating structure proposed for high‑energy proton and electron linacs. Using coupled MAFIA and ANSYS simulations, the authors evaluate temperature distributions, thermal stresses, and frequency shifts for various cooling schemes and heat‑loading conditions.
Results show that web‑channel cooling is required for moderate to high heat loads, while a simple scheme with two straight web channels suffices for loads up to about 10 kW/m. For heat loads above 20 kW/m, a circular drift‑tube channel and smooth coupling windows are recommended to keep stresses below the yield strength of OFHC copper.