Dynamic Tuner Development for Medium β Superconducting Elliptical Cavities

Crispin Contreras-Martinez, Evgueni Borissov, Sergey Cheban, Peter Ostroumov, Yuriy Pischalnikov, Vyacheslav Yakovlev, Jae-Chul Yun, Schaa, Volker RW (Ed.), Satogata, Todd (Ed.)
The Facility for Rare Isotope Beams (FRIB) is developing a 5-cell 644 MHz β_{o}pt=0.65 elliptical cavity for a future linac energy upgrade to 400 MeV/u for the heaviest uranium ions. Superconducting elliptical cavities operated in continuous wave, such as the ones for FRIB, are prone to microphonics which can excite mechanical modes of the cavities. It has been shown that the detuning due to microphonics can be mitigated with the use of piezo actuators (fast tuner) as opposed to the costly
more » ... to the costly option of increasing the input RF power. The FRIB slow/fast dynamic tuner will be based on the Fermilab experience with similar tuners like those developed for the linac coherent light source (LCLS) II and proton improvement plan (PIP) II. This paper will present the results of tuner properties on the bench.
doi:10.18429/jacow-ipac2018-thpal034 fatcat:a6zqs2xa5jenvmi4q4i6pahi7q