Optimized design on thermal stabilization of Linac tube based on solid 3D reconstruction

Copper loss on Linac causes non-uniform thermal deformation and frequency shift of the cavities. The traditional thermal design method empirically requires to control the temperature variation of the accelerator tube within 3 ℃, since the actual frequency shift is difficult to obtain. A new approach has been proposed and implemented. It controls resonant frequency dispersion of the cavities directly, instead of temperature variation. A 3D reconstruction technique, which utilizes skinning surface modeling theory, is employed to rebuild the deformed model of cavities from finite element method (FEA) model. The reconstructed models are imported into Microwave Studio to solve the resonant frequencies of all the cavities to realize thermo-structure-electromagnetic field coupling analysis. The