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| WETEB7 |
A Ferroelectric Fast Reactive Tuner for Superconducting Cavities |
781 |
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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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Slides WETEB7 [21.570 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-SRF2019-WETEB7
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| About • |
paper received ※ 23 June 2019 paper accepted ※ 30 June 2019 issue date ※ 14 August 2019 |
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| THP078 |
CERN’s SRF Test Stand for Cavity Performance Measurements |
1082 |
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- N. Stapley, J. Bastard, M.R. Coly, A.E. Ivanov, A. Macpherson, N.C. Shipman, K. Turaj
CERN, Geneva, Switzerland
- I. Ben-Zvi
BNL, Upton, New York, USA
- A. Castilla
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
- K. Hernandez-Chahin
Universidad de Guanajuato, División de Ciencias e Ingenierías, León, Mexico
- M. Wartak, A. Zwozniak
IFJ-PAN, Kraków, Poland
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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. Due to direct and integrated control and monitoring of environmental test conditions, standard and novel RF measurement procedures have been developed and integrated into the testing infrastructure, along with a coherent data flow of high granularity measurement data. We present an overview of this cavity measurement system and address the underlying architectural structure, data handling and integration of user interfaces. In addition we highlight the benefits of variety of RF cavity measurements that can now be accommodated in our large 2 K cryostats.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-SRF2019-THP078
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|
| About • |
paper received ※ 23 June 2019 paper accepted ※ 30 June 2019 issue date ※ 14 August 2019 |
|
| Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
|
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| |