Additions and Improvements to the RF Cavity Code Superfish

Abstract

SUPERFISH is a computer code that is used extensively to determine rf properties of rf structures. This paper describes a new post processor for SUPERFISH that determines temperature distributions in the metal enabling high average power rf characteristics for various cooling configurations to be examined. Different materials can be incorporated for different parts of the cavity geometry. Sample results for geometries including drift tube linacs and coupled cavity linacs are presented. Other improvements to the code give electric fields at all vacuum mesh points, normalized RFQ geometry parameters, and transit time factors (T_o, T₁, T₂, S', S, S, S_o and S_O) associated with off-axis electric fields for MAPRO beam dynamics codes.