DMRadio-m<sup>3</sup>: QCD axion detection at low masses

ORAL

Abstract

As a proposed solution to the strong CP problem and a compelling candidate for dark matter, the axion is a particle that could have a wide range of possible masses. The DMRadio program searches for low-mass axions using lumped-element haloscopes. Specifically, DMRadio-m3 will be the first time an experiment probes KSVZ and DFSZ sensitivities in its mass range.

DMRadio-m3 employs a solenoid magnet which converts axions into an effective current which is inductively coupled to exchangeable coaxial pickup structures. These pickup structures collectively cover the target frequencies of 10 - 200 MHz. This system is cooled down with a dilution fridge and uses SQUIDs for its first amplifiers, housed in a low magnetic field region.

In this talk, I will provide an overview of the experiment design and proposed schedule for operation.

*The authors acknowledge support for DMRadio-m3 as part of the DOE Dark Matter New Initiatives program under SLAC FWP 100559. Members of the DMRadio Collaboration acknowledge support from the NSF and DOE to individual institutions. Stanford University and UC Berkeley gratefully acknowledge support from the Gordon and Betty Moore Foundation, grant number 7941, and additional support from the Heising-Simons Foundation.

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Publication: A. AlShirawi et al., "Electromagnetic modeling and science reach of DMRadio-m3", arXiv:2302.14084
L. Brouwer et al., "DMRadio-m3: A Search for the QCD Axion Below 1 µeV", Phys.Rev.D 106 (2022) 10, 103008, arXiv:2204.13781

Presenters

  • Andrew K. Yi

    • SLAC National Accelerator Laboratory

Authors

  • Andrew K. Yi

    • SLAC National Accelerator Laboratory