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- N.C. Shipman, J. Bastard, M.R. Coly, F. Gerigk, A. Macpherson, N. Stapley
CERN, Meyrin, Switzerland
- I. Ben-Zvi
BNL, Upton, New York, USA
- G. Burt, A. Castilla
Lancaster University, Lancaster, United Kingdom
- C.-J. Jing, A. Kanareykin
Euclid TechLabs, LLC, Solon, Ohio, USA
- S. Kazakov
Fermilab, Batavia, Illinois, USA
- E. Nenasheva
Ceramics Ltd., St. Petersburg, Russia
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A prototype FerroElectric Fast Reactive Tuner (FE-FRT) for superconducting cavities has been developed, which allows the frequency to be controlled by application of a potential difference across a ferroelectric residing within the tuner. This technique has now become practically feasible due to the recent development of a new extremely low loss ferroelectric material. In a world first, CERN has tested the prototype FE-FRT with a superconducting cavity, and frequency tuning has been successfully demonstrated. This is a significant first step in the development of an entirely new class of tuner. These will allow electronic control of cavity frequencies, by a device operating at room temperature, within timescales that will allow active compensation of microphonics. For many applications this could eliminate the need to use over-coupled fundamental power couplers, thus significantly reducing RF amplifier power.
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