Design and performance of the ADMX SQUID-based microwave receiver

Authors :: Asztalos, S. J.
Carosi, G.
Hagmann, C.
Kinion, D.
van Bibber, K.
Hotz, M.
Rosenberg, L. J
Rybka, G.
Wagner, A.
Hoskins, J.
Martin, C.
Sullivan, N. S.
Tanner, D. B.
Bradley, R.
Clarke, John
Source :: Nuclear Inst. and Methods in Physics Research, A 656 (2011) pp. 39-44
Publication Year :: 2011
Abstract: 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.<br />Comment: 8 pages, 12 figures, Submitted to Nuclear Inst. and Methods in Physics Research, A

Subjects :: Physics - Instrumentation and Detectors
Astrophysics - Cosmology and Nongalactic Astrophysics
High Energy Physics - Experiment

Database :: arXiv
Journal :: Nuclear Inst. and Methods in Physics Research, A 656 (2011) pp. 39-44
Publication Type :: Report
Accession number :: edsarx.1105.4203
Document Type :: Working Paper
Full Text :: https://doi.org/10.1016/j.nima.2011.07.019