Technology for Next Generation Dark-Matter Axion Searches

ORAL

Abstract

The ADMX Collaboration has set limits on the axion-to-photon coupling for axion mass between 1.9 and 3.3 $\mu$eV, assuming both that axions dominate the local halo density and are `hadronic' or KSVZ axions. A definitive search should relax both constraints, i.e. be sensitive to DFSZ model axions comprising a fraction of the local halo density. We will show that such a search could be realized using near-quantum-limited microwave amplifiers based on dc SQUIDs. The first phase of this upgrade is currently underway.

*Supported by the U.S. DOE contracts W-7405-ENG-48 at LLNL and DE-FG02-97ER41029 at UF.

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Authors

  • Darin Kinion

    • Lawrence Livermore National Laboratory

  • S.J. Asztalos

  • G. Carosi

  • C. Hagmann

  • L.J. Rosenberg

  • K. van Bibber

    • Lawrence Livermore National Laboratory

  • L.D. Duffy

  • P. Sikivie

  • D.B. Tanner

    • University of Florida

  • R. Bradley

    • NRAO