SQUID-Based Microwave Cavity Search for Dark-Matter Axions
Abstract
Axions in the μeV 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 3.3μeV and 3.53μeV and sets the stage for a definitive axion search utilizing near quantum-limited SQUID amplifiers.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2010
- DOI:
- 10.1103/PhysRevLett.104.041301
- arXiv:
- arXiv:0910.5914
- Bibcode:
- 2010PhRvL.104d1301A
- Keywords:
-
- 95.35.+d;
- 14.80.Va;
- 95.55.Vj;
- Dark matter;
- Neutrino muon pion and other elementary particle detectors;
- cosmic ray detectors;
- Astrophysics - Cosmology and Extragalactic Astrophysics
- E-Print:
- 4 pages, 5 figures, submitted to PRL