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2026
preprint
Design of ALPHA Phase I: A Plasma Haloscope for 10--20 GHz Post-Inflation Axions
ALPHA Collaboration, Xiran Bai, Rustam Balafendiev, Sean Barrett, Eunice Beato, Pavel Belov, Charles Brown, Eduardo A. Castro Muñoz, Jan Conrad, Marcel Demarteau, Alexander Droster, Joseph Dubois, Jonathan Echevers, Ali Elhadi, Jim A. Enriquez, Maryam H. Esmat, A. Gallo Rosso, Eleanor Graham, Chloe Greenstein, Jon E. Gudmundsson, Karsten M. Heeger, Ishaan Iyer, Heather Jackson, Junu Jeong, Michael J. Jewell, Tyler Johnson, Shriram Jois, Gagandeep Kaur, Claire Laffan, K. W. Lehnert, Samantha M. Lewis, Jacob Lindahl, Reina H. Maruyama, Philip Mauskopf, Andrew M. Meyer, Alexander J. Millar, Hiranya V. Peiris, Jianyang Qi, E. P. Ruddy, S. Sahoo, Denis Sakhno, Michael Sekatchev, Max Silva-Feaver, Shenyang Shi, A. M. Sindhwad, Gaganpreet Singh, Danielle H. Speller, Dajie Sun, Nazifa Tabassum, K. van Bibber, Yongqi Wang, Frank Wilczek, Mackenzie Wooten, Sabrina Zacarias
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Le résumé fourni par la source
The axion is a well-motivated hypothetical particle capable of resolving both the strong CP problem and the dark matter mystery, with recent post-inflationary cosmological simulations favoring masses above 40 μeV. Plasma haloscopes serve as a promising experimental approach to reach theoretically preferred sensitivities in this mass range. ALPHA, hosted at Yale Wright Laboratory, is an international collaboration developing plasma haloscopes to search for QCD dark matter axions. In this letter we present the detailed design and sensitivity projection for the first phase of the ALPHA experiment, which will search the mass range from 10 GHz to 20 GHz (~40 μeV to 80 μeV). This search will make use of wire-array plasma resonators to decouple the physical size from the resonant frequency, a limitation typically faced by traditional microwave cavities, allowing broadband sensitivity approaching KSVZ coupling strengths.
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Les sujets associés
Dark Matter and Cosmic PhenomenaParticle physics theoretical and experimental studiesAstrophysics and Cosmic Phenomena