Abstract
Axions in the 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 and and sets the stage for a definitive axion search utilizing near quantum-limited SQUID amplifiers.
- Received 27 October 2009
DOI:https://doi.org/10.1103/PhysRevLett.104.041301
©2010 American Physical Society