SQUID amplifiers for axion search experiments

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Title
SQUID amplifiers for axion search experiments
Author(s)
Andrei Matlashov; Matthias Schmelz; Vyacheslav Zakosarenko; Ronny Stolz; Yannis K. Semertzidis
Publication Date
2018-04
Journal
CRYOGENICS, v.91, no., pp.125 - 127
Publisher
ELSEVIER SCI LTD
Abstract
In the experiments for dark-matter QCD-axion searches, very weak microwave signals from a low-temperature High-Q resonant cavity should be detected using the highest sensitivity. The best commercial low-noise cryogenic semiconductor amplifiers based on high electron mobility transistors have a lowest noise temperature above 1.0 K, even if they are cooled well below 1 K. Superconducting quantum interference devices can work as microwave amplifiers with temperature noise close to the standard quantum limit. Previous SQUID-based RF amplifiers designed for axion search experiments have a microstrip resonant input coil and are thus called micro-strip SQUID amplifiers or MSAs. Due to the resonant input coupling they usually have narrow bandwidth. In this paper we report on a SQUID-based wideband microwave amplifier fabricated using sub-micron size Josephson junctions with very low capacitance. A single amplifier can be used in a frequency range of approximately 1–5 GHz. © 2018 Published by Elsevier Ltd.
URI
https://pr.ibs.re.kr/handle/8788114/4437
ISSN
0011-2275
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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