A search for cosmic axions

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5261058

Hagmann, C A

A search experiment was carried out to look for relic cosmic axions trapped in the halo of the Galaxy and limits on their abundance are presented for several axion mass ranges. The detector consisted of a high Q microwave cavity immersed in liquid helium and permeated by a strong magnetic field. A low noise microwave receiver with a cryogenic HEMT amplifier as its first stage was coupled to the cavity. The noise power within a cavity bandwidth was spectrum analyzed and searched for narrow peaks resulting from axion to photon conversions via the Primakoff effect. The resonance frequency was changed by displacing a dielectric rod inside the cavity.

• Research Organization: Florida Univ., Gainesville, FL (United States)
• OSTI ID: 5261058
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AXIONS
BOSONS
COSMIC RADIATION
DATA
DETECTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
GOLDSTONE BOSONS
INFORMATION
IONIZING RADIATIONS
MAGNETIC FIELDS
MASSLESS PARTICLES
MICROWAVE RADIATION
NUMERICAL DATA
PHOTONS
POSTULATED PARTICLES
RADIATIONS
RELICT RADIATION