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Detailed design and optimization of ferroelectric tuners
/ Ben-Zvi, Ilan (Stony Brook U.) ; Macpherson, Alick (CERN) ; Smith, Samuel (CERN)
A detailed, step-by-step design methodology of a Ferroelectric Fast Reactive Tuner (FE-FRT) capable of modulating Mega VAR reactive powers on a sub-microsecond time scale is given. Closed expressions of values for all the components of the tuner are detailed, and tuner performance optimization is addressed, resulting in a Figure of Merit measure of FE-FRT tuner performance and use case applicability over a wide range of RF frequencies and reactive power levels. [...]
arXiv:2504.19825.-
2025-09-01 - 11 p.
- Published in : Phys. Rev. Accel. Beams 28 (2025) 093502
Fulltext: 2504.19825 - PDF; document - PDF;
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Ferro-Electric Fast Reactive Tuner Applications for SRF Cavities
/ Shipman, Nicholas C (CERN) ; Ben-Zvi, Ilan (BNL, NSLS) ; Burt, Graeme (Cockcroft Inst. Accel. Sci. Tech.) ; Castilla, Alejandro (Cockcroft Inst. Accel. Sci. Tech. ; CERN) ; Coly, Marcel R (CERN) ; Gerigk, Frank (CERN) ; Jing, Chunguang J (Euclid Techlabs, Solon) ; Kanareykin, Alexei (Euclid Techlabs, Solon) ; Macpherson, Alick (CERN) ; Stapley, Niall (CERN) et al.
A Ferro-Electric fast Reactive Tuner (FE-FRT) is a novel type of RF cavity tuner containing a low loss ferroelectric material. FE-FRTs have no moving parts and allow cavity frequencies to be changed extremely quickly (on the timescale of 100s of ns or less). [...]
Geneva : JACoW, 2021 - 6 p.
- Published in : JACoW IPAC 2021 (2021) 1305-1310
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1305-1310
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6.
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A Ferroelectric Fast Reactive Tuner (FE-FRT) to Combat Microphonics
/ Shipman, Nicholas (CERN) ; Bastard, Jeremy (CERN) ; Ben-Zvi, Ilan (Brookhaven) ; Burt, Graeme (Lancaster U.) ; Castilla, Alejandro (Lancaster U.) ; Coly, Marcel (CERN) ; Gerigk, Frank (CERN) ; Jing, Chunguang (Euclid Techlabs, Solon) ; Kanareykin, Alexei (Euclid Techlabs, Solon) ; Macpherson, Alick (CERN) et al.
A prototype Fast Reactive Tuner (FRT) for superconducting cavities has been developed, which allows the frequency to be controlled by application of a potential difference across a newly developed ultra-low loss ferro-electric material residing within the tuner. The tuner operates at room temperature, outside of the cryostat and coupled to the cavity via an antenna and co-axial cable. [...]
2020 - 6 p.
- Published in : 10.18429/JACoW-ERL2019-TUCOZBS02
Fulltext: PDF;
In : 63rd ICFA Advanced Beam Dynamics Workshop on Energy Recovery Linacs, Berlin, Germany, 15 - 20 Sep 2019, pp.TUCOZBS02
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CERN’s SRF Test Stand for Cavity Performance Measurements
/ Stapley, Niall (CERN) ; Bastard, Jeremy (CERN) ; Ben-Zvi, Ilan (Brookhaven Natl. Lab.) ; Castilla, Alejandro (Lancaster U.) ; Coly, Marcel (CERN) ; Hernandez-Chahin, K (Guanajuato U.) ; Ivanov, Anton (CERN) ; Macpherson, Alick (CERN) ; Shipman, Nicholas (CERN) ; Turaj, Katarzyna (CERN) et al.
Recent deployment of a digital LLRF system within the cavity testing framework of CERN’s vertical test cryostats has permitted a full revamp of cavity performance validation. With both full continuous and pulse mode operation, steady state a transient RF behaviour can be effectively probed. [...]
2019 - 5 p.
- Published in : 10.18429/JACoW-SRF2019-THP078
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.1084-1088
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A Ferroelectric Fast Reactive Tuner for Superconducting Cavities
/ 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) et al.
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. [...]
SRF2019.-
2019 - 8 p.
- Published in : 10.18429/JACoW-SRF2019-WETEB7
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.783-790
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Cryogenic RF performance of double-quarter wave cavities equipped with HOM filters
/ Verdú-Andrés, Silvia (Brookhaven Natl. Lab.) ; Ben-Zvi, Ilan (Stony Brook U. ; Brookhaven Natl. Lab.) ; Burt, Graeme (Lancaster U. ; Daresbury) ; Calaga, Rama (CERN) ; Capatina, Ofelia (CERN) ; Huque, Naeem (Jefferson Lab) ; Li, Zenghai (SLAC) ; McEwen, Anne (Jefferson Lab) ; Mitchell, James (Lancaster U.) ; Park, HyeKyoung (Jefferson Lab) et al.
Crab cavities are one of the several components included in the luminosity upgrade of the Large Hadron Collider (HL-LHC). The cavities have to provide a nominal deflecting kick of 3.4 MV per cavity while the cryogenic load per cavity stays below 5 W. [...]
CERN-ACC-2019-221.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPRB098
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB098
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