ADMX Phase II : Relocation and Millikelvin Cooling

Journal Article · Mon Aug 30 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3489540· OSTI ID:21426556

Heilman, Jesse; Tracy, Kyle ^[1]

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1. University of Washington, Center for Experimental Nuclear Physics and Astrophysics, Seattle, Washington 98195 (United States)

Low mass axions are an attractive candidate for making up dark matter. While there are several models for how the Axion couples with other matter, were they to be the majority of the local galactic dark matter halo, they would have a number density on the order of 10{sup 14} cm{sup -3}. The Axion Dark Matter eXperiment (ADMX) is a microwave cavity experiment searching for axion Dark Matter via the axion's electromagnetic coupling. While the original ADMX did not see evidence of axions, the experiment is planned to go through two phases of upgrades to expand its sensitivity and provide a definitive search for axion dark matter. The first phase established the use of a SQUID amplifier which can reduce the amplifier noise temperature to the 100 mK range. In the second phase we will first move the experiment from LLNL to CENPA at the University of Washington. Once the experiment has been moved successfully we will install a dilution refrigerator to cool the cavity to the 100 mK range thus increasing the sensititivity to the level required to scan the remainder of the allowed model space.

• OSTI ID: 21426556
• Journal Information: AIP Conference Proceedings, Vol. 1274, Issue 1; Conference: AXIONS 2010: International conference on the cosmology, astrophysics and particle physics of the axion and the results of recent searches for this hypothetical particle, Gainesville, FL (United States), 15-18 Jan 2010; Other Information: DOI: 10.1063/1.3489540; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLIFIERS
AXIONS
CAVITY RESONATORS
COUPLING
MICROWAVE RADIATION
NOISE
NONLUMINOUS MATTER
PARTICLE IDENTIFICATION
RADIATION DETECTORS
REFRIGERATORS
REST MASS
SENSITIVITY
SQUID DEVICES
TEMPERATURE RANGE 0000-0013 K
BOSONS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
FLUXMETERS
GOLDSTONE BOSONS
MASS
MATTER
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
POSTULATED PARTICLES
RADIATIONS
RESONATORS
SUPERCONDUCTING DEVICES
TEMPERATURE RANGE