A SQUID-based microwave cavity search for dark-matter axions

Axions in the {mu}eV mass range are a plausible cold dark matter candidate and may be detected by their conversion into microwave photons in a resonant cavity immersed in a static magnetic field. The first result from such an axion search using a superconducting first-stage amplifier (SQUID) is repo...

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Bibliographic Details
Published in:Physical review letters 2009-10, Vol.104 (4)
Main Authors: Asztalos, S J, Carosi, G, Hagmann, C, Kinion, D, van Bibber, K, Hotz, M, Rosenberg, L, Rybka, G, Hoskins, J, Hwang, J, Sikivie, P, Tanner, D B, Bradley, R, Clarke, J
Format: Article
Language:English
Subjects:
AMPLIFIERS
AXIONS
FIELD EFFECT TRANSISTORS
MAGNETIC FIELDS
NONLUMINOUS MATTER
PHOTONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SENSITIVITY
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Summary:Axions in the {mu}eV mass range are a plausible cold dark matter candidate and may be detected by their conversion into microwave photons in a resonant cavity immersed in a static magnetic field. The first result from such an axion search using a superconducting first-stage amplifier (SQUID) is reported. The SQUID amplifier, replacing a conventional GaAs field-effect transistor amplifier, successfully reached axion-photon coupling sensitivity in the band set by present axion models and sets the stage for a definitive axion search utilizing near quantum-limited SQUID amplifiers.
ISSN:0031-9007
1079-7114