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

Journal Article · Wed Oct 21 00:00:00 EDT 2009 · Physical Review Letters

OSTI ID:986065

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

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.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 986065
• Report Number(s): LLNL-JRNL-418573; PRLTAO; TRN: US1006296
• Journal Information: Physical Review Letters, Vol. 104, Issue 4; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLIFIERS
AXIONS
FIELD EFFECT TRANSISTORS
MAGNETIC FIELDS
NONLUMINOUS MATTER
PHOTONS
SENSITIVITY