The “Gen 2” Axion Dark Matter Experiment (ADMX)

Technical Report · Tue Apr 23 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1508642· OSTI ID:1508642

Tanner, David B.  ^[1]; Sullivan, Neil S. ^[1]

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1. Univ. of Florida, Gainesville, FL (United States)

The Generation-2 ADMX project is an upgrade of the existing Axion Dark Matter eXperiment to add a high-performance dilution refrigerator to the cavity axion detector. The refrigerator reduces the operating temperature of the experiment from 3–4 K to of order 0.12 K (120 mK). There is a corresponding 20-fold reduction in the background noise of the experiment. The refrigerator has been installed and commissioned. The reduced background has allowed a search for the very weakly-coupled but highly compelling DFSZ-model axions. This search, at this sensitivity, is a definitive experiment, able to detect axions or to reject the axion dark matter hypothesis with high confidence.

• Research Organization: Univ. of Florida, Gainesville, FL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: SC0009723; SC0009723TDD
• OSTI ID: 1508642
• Report Number(s): DOE-UFLORIDA-0009723
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS
Dark Matter
Axions
Strong CP Problem