Speaker
Description
Fast tuning of SRF cavities at high power is critically important for applications like correction of microphonics, transient beam loading and fast frequency switching. With the talk, we present recent developments of the active elements for the high-power Ferroelectric Fast Reactive Tuners (FRT). This technique has now become practically feasible due to the recent development of a new extremely low loss and fast (10 ns-100 ns time range) ferroelectric material, which has been evaluated, and fast frequency tuning has been demonstrated. The first FRT was developed by Euclid in collaboration with FNAL and BNL and successfully tested at low power for the microphonic compensation at CERN. The Horizon Europe iSAS project focuses on improving accelerator efficiency and includes the integration of a ferroelectric fast reactive tuner (FE-FRT) for high power applications to enhance energy conservation. In the U.S., FE-FRT technology is under active development for microphonics compensation in CEBAF as well. With this talk, we will overview the current FRT designs that are been developed for high power SRF systems and discuss the active ferroelectric elements parameters of the FRT for the microphonics and transient beam loading compensations**.
Funding Agency
The US Department of Energy, DE-SC0026029
Footnotes
Ferro-Electric Fast Reactive Tuner (FE-FRT) Workshop 2025, https://events.hifis.net/event/2275/
I.Ben-Zvi et al. PRAB 27, 052001 (2024)
**E. Nenasheva et al. Ferroelectrics. 2017, 506, 174.
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