Title :
Development and testing of a prototype tuner for the CEBAF upgrade cryomodule
Author :
Davis, G. ; Delayen, J. ; Drury, M. ; Feldl, E.
Author_Institution :
TJNAF, Newport News, VA, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
An upgrade cryomodule is being developed for CEBAF at Jefferson Lab. The high-gradient, low-current operation of the superconducting cavities puts stringent requirements on the accuracy of the frequency tuner: a resolution of 1 Hz over a range of 400 kHz. We have developed and tested such a tuner; it consists of a stepper-motor-driven coarse tuner, operating in series with a piezo-actuator-driven fine tuner. Tuner test procedures and results are summarized, including frequency resolution, range, and linearity (i.e. frequency vs. tuner position), as well as microphonic effects resulting from tuner operation
Keywords :
cryogenics; piezoelectric actuators; testing; tuning; CEBAF; cryomodule; frequency range; frequency resolution; frequency tuner; linearity; microphonic; piezo-actuator-driven fine tuner; piezoelectric actuators; stepper-motor-driven coarse tuner; superconducting cavities; test; Delay; Frequency measurement; Hysteresis motors; Linearity; Micromotors; Phase locked loops; Prototypes; Testing; Tuners; Tuning;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.986609
