Abstract
Haloscopic axion searches require the tuning of a TM mode in a microwave cavity. Traditional cavities contain many unwanted modes which can result in mode crossings, ultimately reducing the effective tuning range of a cavity and slowing scan rates. Photonic band gap (PBG) structures have the potential to create resonators without TE modes, allowing for uninterrupted tuning. A tunable PBG structure has been designed for HAYSTAC. A prototype has been built and tested to validate simulations. Results of the fixed frequency case will be shown as well as details of the expected tuning.
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Acknowledgements
This work was supported under the auspices of the National Science Foundation, under grant PHY-1306729, and the Heising-Simons Foundation under grant 2014-182.
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Lewis, S.M. (2018). First Test of a Photonic Band Gap Structure for HAYSTAC. In: Carosi, G., Rybka, G., van Bibber, K. (eds) Microwave Cavities and Detectors for Axion Research. Springer Proceedings in Physics, vol 211. Springer, Cham. https://doi.org/10.1007/978-3-319-92726-8_8
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DOI: https://doi.org/10.1007/978-3-319-92726-8_8
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