Title :
Microphonics measurements in SRF cavities for RIA
Author :
Kelly, M.P. ; Shepard, K.W. ; Kedzie, M. ; Fuerst, J.D. ; Sharamentov, S. ; Delayen, J.
Author_Institution :
Argonne Nat. Lab., IL, USA
Abstract :
Phase stabilization of the RIA drift tube cavities in the presence of microphonics will be a key issue for RIA. Due to the relatively low beam currents (≤0.5 pmA) required for the RIA driver, microphonics will impact the rf power required to control the cavity fields. Microphonics measurements on the ANL β=0.4 single spoke cavity and on the ANL β=0.4 two-cell spoke cavity have been performed many at high fields and using a new "cavity resonance monitor" device developed in collaboration with JLAB. Tests on a cold two-cell spoke are the first ever on a multi-cell spoke geometry. The design is essentially a production model with an integral stainless steel housing to hold the liquid helium bath.
Keywords :
accelerator RF systems; accelerator cavities; beam handling techniques; ion accelerators; linear accelerators; particle beam diagnostics; particle beam dynamics; particle beam stability; superconducting cavity resonators; RIA drift tube cavities; SRF cavities; cavity fields; cavity resonance monitor; low beam currents; microphonics measurements; multicell spoke geometry; phase stabilization; rf power; two-cell spoke cavity; Frequency; Helium; Monitoring; Performance evaluation; Phase locked loops; Production; Resonance; Signal generators; Steel; Testing;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1289682
