PROTOTYPING OF TEM-LIKE MODE RESONATORS IN THE RAON

Preliminary electro-magnetic designs of TEM-like mode resonators (a quarter wave resonator, a half wave resonator, two single spoke resonators) are accomplished for the superconducting linear accelerator in the RAON [1]. Resonant cavities are numerically optimized using a CST MWS code to obtain higher E-field gradient along the beam line in conditions of the peak E-field and B-field is less than 30MV/m, 60mT respectively. Prototyping of a quarter wave resonator of optimum beta 0.047 is in progress to analyze resonant frequency shifting by tolerances in fabrication process and external perturbations. It will be compared with expected one using computational codes.