Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.041301
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Funding
- U.S. Department of Energy [DE-FG02-96ER40956, DE-AC52-07NA27344, DE-FG02-97ER41029, DE-AC02-05CH11231]
- Lawrence Livermore National Laboratory
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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. We report the first result from such an axion search using a superconducting first-stage amplifier (SQUID) replacing a conventional GaAs field-effect transistor amplifier. This experiment excludes KSVZ dark-matter axions with masses between 3: 3 mu eV and 3: 53 mu eV and sets the stage for a definitive axion search utilizing near quantum-limited SQUID amplifiers.
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