ADMX Extended Frequency Range (EFR): Searching for 2-4GHz axions with 18 cavities

ORAL

Abstract

ADMX (Axion Dark Matter eXperiment) is the world-leading search for QCD axion dark matter in the μeV mass range. ADMX detects axions via their conversion to photons under a strong magnetic field in a high-Q resonant cavity. ADMX-EFR is designed to use an array of 18 cavities and coherent power combining to cover a range from 2-4GHz (8-16μeV axion mass) with DFSZ benchmark sensitivity in a 3 year operation using a designated 9.4T MRI magnet at Fermilab. In this talk we outline the conceptual design of EFR based on experience and R&D from previous ADMX runs and present a detailed sensitivity estimate for EFR.

*This work is supported by U.S. DOE through Grants No DE-SC0009800, No. DE-SC0009723, No. DE-SC0010296, No. DE-SC0010280, No. DE-SC0011665, No. DEFG02-97ER41029, No. DE-FG02-96ER40956, No. DEAC52-07NA27344, No. DE-C03-76SF00098 and No. DE-SC0017987. Fermilab is a U.S. Department of Energy, Office of Science, HEP User Facility managed by Fermi Research Alliance, LLC (FRA), under Contract No. DE-AC02-07CH11359. Additional support was provided by the Heising-Simons Foundation and by the LLNL and PNNL LDRD office. U. of Western Australia participation funded by the ARC Centre of Excellence for Engineered Quantum Systems, CE170100009, and Dark Matter Particle Physics, CE200100008.

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Publication: Conceptual Design of ADMX-EFR, arXiv:23xx.xxxxx (in preparation)

Presenters

  • Stefan P Knirck

    • Fermilab

Authors

  • Stefan P Knirck

    • Fermilab