Design and performance of the ADMX SQUID-based microwave receiver
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.
Cite
@article{arxiv.1105.4203,
title = {Design and performance of the ADMX SQUID-based microwave receiver},
author = {S. J. Asztalos and G. Carosi and C. Hagmann and D. Kinion and K. van Bibber and M. Hotz and L. J Rosenberg and G. Rybka and A. Wagner and J. Hoskins and C. Martin and N. S. Sullivan and D. B. Tanner and R. Bradley and John Clarke},
journal= {arXiv preprint arXiv:1105.4203},
year = {2015}
}
Comments
8 pages, 12 figures, Submitted to Nuclear Inst. and Methods in Physics Research, A