Design and performance of the ADMX SQUID-based microwave receiver

The Axion Dark Matter eXperiment (ADMX) was designed to detect ultra-weakly interacting relic axion particles by searching for their conversion to microwave photons in a resonant cavity positioned in a strong magnetic field. Given the extremely low expected axion-photon conversion power we have desi...

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Veröffentlicht in:	arXiv.org 2011-05
Hauptverfasser:	Asztalos, S J, Carosi, G, Hagmann, C, Kinion, D, K van Bibber, Hotz, M, Rosenberg, L J, Rybka, G, Wagner, A, Hoskins, J, Martin, C, Sullivan, N S, Tanner, D B, Bradley, R, Clarke, John
Format:	Artikel
Sprache:	eng
Schlagworte:	Conversion Dark matter Noise temperature Photons Physics - Cosmology and Nongalactic Astrophysics Physics - High Energy Physics - Experiment Physics - Instrumentation and Detectors Superconducting quantum interference devices
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Zusammenfassung:	The Axion Dark Matter eXperiment (ADMX) was designed to detect ultra-weakly interacting relic axion particles by searching for their conversion to microwave photons in a resonant cavity positioned in a strong magnetic field. Given the extremely low expected axion-photon conversion power we have designed, built and operated a microwave receiver based on a Superconducting QUantum Interference Device (SQUID). We describe the ADMX receiver in detail as well as the analysis of narrow band microwave signals. We demonstrate the sustained use of a SQUID amplifier operating between 812 and 860 MHz with a noise temperature of 1 K. The receiver has a noise equivalent power of 1.1x10^-24 W/sqrt(Hz) in the band of operation for an integration time of 1.8x10^3 s.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1105.4203