Electromagnetic modeling and science reach of DMRadio-m³

Journal Article · Tue Sep 02 00:00:00 UTC 2025 · Physical Review. D.

DOI: https://doi.org/10.1103/bwgd-kxsb · OSTI ID:3003292

AlShirawi, A.  ^[1]; Ankel, V.  ^[2]; Bartram, C.  ^[3]; Begin, J.  ^[4]; Bell, C.  ^[2]; Benabou, J. N.  ^[5]; Brouwer, L.  ^[6]; Chaudhuri, S.  ^[4]; Cho, H.-M.  ^[3]; Corbin, J.  ^[2]; Craddock, W.  ^[7]; Cuadra, S.  ^[8]; Droster, A.  ^[9]; Echevers, J.  ^[9]; Foster, J. W.  ^[8]; Fry, J. T.  ^[8]; Graham, P. W.  ^[1]; Henning, R.  ^[10]; Irwin, K. D.  ^[11]; Kadribasic, F.  ^[2] ; Kahn, Y.  ^[12]; Keller, A.  ^[9]; Kolevatov, R.  ^[4]; Kuenstner, S.  ^[2]; Kunder, A.  ^[2]; Kurita, N.  ^[7]; Leder, A. F.  ^[5]; Li, D.  ^[3]; Otto, N.  ^[4]; Ouellet, J. L.  ^[8]; Pappas, K. M. W.  ^[8]; Phipps, A.  ^[13]; Rapidis, N. M.  ^[2]; Safdi, B. R.  ^[5]; Salemi, C. P.  ^[11]; Simanovskaia, M.  ^[2]; Singh, J.  ^[2]; Stark, P.  ^[11]; van Assendelft, E. C.  ^[2]; van Bibber, K.  ^[9]; Wells, K.  ^[1]; Wiedemann, J.  ^[4]; Winslow, L.  ^[8]; Wisniewski, W. J.  ^[7]; Wright, D.  ^[2]; Yi, A. K.  ^[3]; Young, B. A.  ^[14]

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1. Stanford University
2. Stanford University; Stanford University
3. Stanford University; SLAC National Accelerator Laboratory
4. Princeton University
5. University of California, Berkeley; Lawrence Berkeley National Laboratory
6. Lawrence Berkeley National Laboratory
7. SLAC National Accelerator Laboratory
8. Massachusetts Institute of Technology
9. University of California, Berkeley
10. University of North Carolina, Chapel Hill; Triangle Universities Nuclear Laboratory
11. Stanford University; Stanford University; SLAC National Accelerator Laboratory
12. University of Illinois at Urbana-Champaign
13. California State University, East Bay
14. Santa Clara University

DMRadio-m³ is an experimental search for dark matter axions. It uses a solenoidal dc magnetic field to convert an axion dark-matter signal to an ac electromagnetic response in a coaxial copper pickup. The current induced by this axion signal is measured by dc SQUIDs. DMRadio-m³ is designed to be sensitive to Kim-Shifman-Vainshtein-Zakharov (KSVZ) and Dine-Fischler-Srednicki-Zhitnisky (DFSZ) QCD axion models in the 10–200 MHz (41 neV/𝑐²–0.83 μ⁢eV/𝑐²) range, and to axions with 𝑔_{𝑎⁢𝛾⁢𝛾} =𝑔_{𝑎⁢𝛾⁢𝛾,DFSZ}⁡(30 MHz) =1.87 ×10⁻¹⁷ GeV⁻¹ over 5–30 MHz as an extended goal. In this work, we present the electromagnetic modeling of the response of the experiment to an axion signal over the full frequency range of DMRadio-m³, which extends from the low-frequency, lumped-element limit to a regime where the axion Compton wavelength is only a factor of 2 larger than the detector size. With these results, we determine the live time and sensitivity of the experiment. The primary science goal of sensitivity to DFSZ axions across 30–200 MHz can be achieved with a 3⁢𝜎 live scan time of 2.9 years.

• Research Organization: Duke University, Durham, NC (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: DMRadio Collaboration
• Grant/Contract Number: AC02-05CH11231; FG02-97ER41033; SC0015655; SC0018988; SC0019225
• OSTI ID: 3003292
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 5 Vol. 112; ISSN 2470-0010; ISSN 2470-0029
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English