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  • Open Access

Search for Axion Dark Matter from 1.1 to 1.3 GHz with ADMX

G. Carosi, C. Cisneros, N. Du*, S. Durham, and N. Robertson

C. Goodman, M. Guzzetti, C. Hanretty, K. Enzian, L. J. Rosenberg, G. Rybka, J. Sinnis, and D. Zhang

John Clarke and I. Siddiqi

A. S. Chou, M. Hollister, and A. Sonnenschein

S. Knirck

T. J. Caligiure, J. R. Gleason, A. T. Hipp, P. Sikivie, M. E. Solano, N. S. Sullivan, and D. B. Tanner

R. Khatiwada

L. D. Duffy

C. Boutan, T. Braine, E. Lentz, N. S. Oblath, and M. S. Taubman

E. J. Daw, C. Mostyn, and M. G. Perry

C. Bartram, J. Laurel, and A. Yi

T. A. Dyson, S. Ruppert, and M. O. Withers

C. L. Kuo

B. T. McAllister

J. H. Buckley, C. Gaikwad, J. Hoffman, and K. Murch

M. Goryachev, E. Hartman, A. Quiskamp, and M. E. Tobar

  • *Contact author: du4@llnl.gov
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Phys. Rev. Lett. 135, 191001 – Published 3 November, 2025

DOI: https://doi.org/10.1103/d7mg-6sqq

Abstract

Axion dark matter can satisfy the conditions needed to account for all of the dark matter and solve the strong CP problem. The Axion Dark Matter eXperiment (ADMX) is a direct dark matter search using a haloscope to convert axions to photons in an external magnetic field. Key to this conversion is the use of a microwave resonator that enhances the sensitivity at the frequency of interest. The ADMX experiment boosts its sensitivity using a dilution refrigerator and near quantum-limited amplifier to reduce the noise level in the experimental apparatus. In the most recent run, ADMX searched for axions between 1.10 and 1.31 GHz to extended Kim-Shifman-Vainshtein-Zakharov sensitivity. This Letter reports on the results of that run, as well as unique aspects of this experimental setup.

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Phys. Rev. Lett. 135, 191001– Published 3 November, 2025
  • Received 11 April 2025
  • Accepted 19 September 2025
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