| Paper | Title | Page |
|---|
| WEP67 | Low-level RF control of microphonics in superconducting spoke-loaded cavities | 669 |
| | - Z. A. Conway, M. P. Kelly, S. I. Sharamentov, K. W. Shepard
ANL - G. K. Davis, J. Delayen
TJNAF - L. R. Doolittle
LBNL
| |
| | This paper presents the results of cw RF frequency
control and RF phase-stabilization experiments performed
with a piezoelectric fast tuner mechanically coupled to a
superconducting, 345 MHz, beta = 0.5 triple-spoke-loaded
cavity operating at 4.2K. The piezoelectric fast tuner
damped low-frequency microphonic-noise by an order of
magnitude. Two methods of RF phase-stabilization were
characterized: overcoupling with negative phase feedback,
and also fast mechanical tuner feedback. The beta = 0.5
triple-spoke-loaded cavity RF field amplitude and phase
errors were controlled to +(-)0.5% and +(-)30 respectively. | |