CERN Accelerating science

Published Articles
Report number	SRF2019
Title	A Ferroelectric Fast Reactive Tuner for Superconducting Cavities
Author(s)	Shipman, Nicholas (CERN) ; Bastard, Jeremy (CERN) ; Ben-Zvi, Ilan (Brookhaven Natl. Lab.) ; Burt, Graeme (Lancaster U.) ; Castilla, Alejandro (Lancaster U.) ; Coly, Marcel (CERN) ; Gerigk, Frank (CERN) ; Jing, Chunguang (Euclid Techlabs, Solon) ; Kanareykin, Alexei (Euclid Techlabs, Solon) ; Kazakov, Sergey (Fermilab) ; Macpherson, Alick (CERN) ; Nenasheva, Elisaveta (Ceramics Co., St. Petersburg) ; Stapley, Niall (CERN)
Publication	2019
Number of pages	8
In:	19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.783-790
DOI	10.18429/JACoW-SRF2019-WETEB7
Subject category	Accelerators and Storage Rings
Abstract	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.
Copyright/License	Publication: Any distribution of this work must maintain attribution to the author(s), title of the work, publisher, and DOI. CC-BY-3.0

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