UPDATE OF THE MECHANICAL DESIGN OF THE 650 MHZ BETA=0.9 CAVITIES FOR PROJECT X

摘要

The design of 5-cell elliptical 650 MHz β=0.9 cavities to accelerate 1 mA at an average H-beam current in the range 467-3000 MeV for Project X Linac [1] is under development at Fermilab. The design of a dressed cavity has been mechanically optimized by minimizing df/dP, the sensitivity to microphonics detuning due to fluctuations in helium pressure. We will present the results of COMSOL multiphysics simulations of mechanical resonances and cavity tuneability. We will also present the mechanical design of slow and fast tuners and ANSYS analysis of their properties.