Computer Designed 805 MHz Proton Linac Cavities

摘要

A numerical mesh calculation which computes the fields and frequency for a resonant cavity has been developed. Fields for any cavity which has cylindrical symmetry, and for which the magnetic field has only a θ component, can be computed. The program has been used on the IBM 7094 to study 805 MHz proton linac cavities. These design studies have shown that cavities having curved walls and triangular drift tubes give improved performance. Calculated values of ``shunt impedance'''' per unit length ZT2 for such cavities range from 32.4 MΩ/m at β=v/c=0.45 to 53.0 MΩ/m at β=1. Experimental measurements have verified the calculations.