Design and fabrication of a traveling-wave muffin-tin accelerating structure at 90 GHz

A prototype of a muffin-tin accelerating structure operating at 32 times the SLAG frequency (2.856 GHz) was built for research in high gradient acceleration. A traveling-wave design with single input and output feeds was chosen for the prototype which was fabricated by wire electrodischarge machining. Features of the mechanical design for the prototype are described. Design improvements are presented including considerations of cooling and vacuum.