Design of a Fast Reactive Tuner for 1.3 GHz TESLA cavities at MESA
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912450429845504 |
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| author | Monroy-Villa, Ricardo Ben-Zvi, Ilan Hug, Florian Stengler, Timo |
| author_facet | Monroy-Villa, Ricardo Ben-Zvi, Ilan Hug, Florian Stengler, Timo |
| contents | This work presents a state-of-the-art design of a Ferroelectric Fast Reactive Tuner (FE-FRT), capable of modulating high reactive power in TESLA type cavities on a microsecond time scale. The Mainz Energy-Recovering Superconducting Accelerator employs superconducting radio frequency cavities operating at 1.3 GHz, achieving quality factors on the order of $10^{10}$. However, detuning of $\pm$25 Hz induced by microphonics have led to the use of strong coupling for the fundamental power coupler, requiring high-power amplifiers, orders of magnitude above the intrinsic dissipation. Current solutions to mitigate microphonics rely on piezoelectric tuners, which are not fast enough for the spectral range of the microphonics. A novel alternative is the FE-FRT, a technology made possible by the development of low-loss ferroelectric materials, which offer sub-microsecond response times. Analytical results are provided along with their validation through finite-element simulations. The FE-FRT is expected to handle substantial reactive power while offering a tuning range of 50 Hz in these type of cavities, resulting in a reduction in peak forward RF power by about an order of magnitude. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_20840 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Design of a Fast Reactive Tuner for 1.3 GHz TESLA cavities at MESA Monroy-Villa, Ricardo Ben-Zvi, Ilan Hug, Florian Stengler, Timo Accelerator Physics This work presents a state-of-the-art design of a Ferroelectric Fast Reactive Tuner (FE-FRT), capable of modulating high reactive power in TESLA type cavities on a microsecond time scale. The Mainz Energy-Recovering Superconducting Accelerator employs superconducting radio frequency cavities operating at 1.3 GHz, achieving quality factors on the order of $10^{10}$. However, detuning of $\pm$25 Hz induced by microphonics have led to the use of strong coupling for the fundamental power coupler, requiring high-power amplifiers, orders of magnitude above the intrinsic dissipation. Current solutions to mitigate microphonics rely on piezoelectric tuners, which are not fast enough for the spectral range of the microphonics. A novel alternative is the FE-FRT, a technology made possible by the development of low-loss ferroelectric materials, which offer sub-microsecond response times. Analytical results are provided along with their validation through finite-element simulations. The FE-FRT is expected to handle substantial reactive power while offering a tuning range of 50 Hz in these type of cavities, resulting in a reduction in peak forward RF power by about an order of magnitude. |
| title | Design of a Fast Reactive Tuner for 1.3 GHz TESLA cavities at MESA |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2506.20840 |