A Prototype Hybrid Mode Cavity for Heterodyne Axion Detection
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915860419969024 |
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| author | Li, Zenghai Zhou, Kevin Oriunno, Marco Berlin, Asher Calatroni, Sergio D'Agnolo, Raffaele Tito Ellis, Sebastian A. R. Schuster, Philip Tantawi, Sami G. Toro, Natalia |
| author_facet | Li, Zenghai Zhou, Kevin Oriunno, Marco Berlin, Asher Calatroni, Sergio D'Agnolo, Raffaele Tito Ellis, Sebastian A. R. Schuster, Philip Tantawi, Sami G. Toro, Natalia |
| contents | In the heterodyne approach to axion detection, axion dark matter induces transitions between two modes of a microwave cavity, resulting in a parametrically enhanced signal power. We describe the fabrication and characterization of a prototype normal conducting cavity specifically optimized for heterodyne detection. Corrugations on the cavity walls support linearly polarized hybrid modes which maximize the signal power while strongly suppressing noise. We demonstrate tuning mechanisms which allow one mode's frequency to be scanned across a 4 MHz range, while suppressing cross-coupling noise by at least 80 dB. A future superconducting cavity with identical geometry to our prototype would have the potential to probe orders of magnitude beyond astrophysical bounds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_07173 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Prototype Hybrid Mode Cavity for Heterodyne Axion Detection Li, Zenghai Zhou, Kevin Oriunno, Marco Berlin, Asher Calatroni, Sergio D'Agnolo, Raffaele Tito Ellis, Sebastian A. R. Schuster, Philip Tantawi, Sami G. Toro, Natalia Instrumentation and Detectors High Energy Physics - Experiment High Energy Physics - Phenomenology In the heterodyne approach to axion detection, axion dark matter induces transitions between two modes of a microwave cavity, resulting in a parametrically enhanced signal power. We describe the fabrication and characterization of a prototype normal conducting cavity specifically optimized for heterodyne detection. Corrugations on the cavity walls support linearly polarized hybrid modes which maximize the signal power while strongly suppressing noise. We demonstrate tuning mechanisms which allow one mode's frequency to be scanned across a 4 MHz range, while suppressing cross-coupling noise by at least 80 dB. A future superconducting cavity with identical geometry to our prototype would have the potential to probe orders of magnitude beyond astrophysical bounds. |
| title | A Prototype Hybrid Mode Cavity for Heterodyne Axion Detection |
| topic | Instrumentation and Detectors High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2507.07173 |