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An Ultra High Quality Factor Radio Frequency SQUID Magnetometer Based on a Liquid Helium Cooled Quartz Resonator
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posted on 2023-06-08, 09:57 authored by H Prance, R Whiteman, V Schollmann, Robert PranceWe discuss a technique for coupling a single weak link SQUID ring to a very high quality factor (Q) external resonator. For this purpose, we make use of a radio frequency (20MHz) quartz crystal compatible with liquid helium operation Knowing the equivalent circuit of the resonator, we have been able to design the proper inductive coupling between it resonator and the SQUID ring. We provide an experimental example of this system utilizing a niobium point contract ring coupled to a 4.2K quartz crystal with a loaded Q of 10(5). We consider the application of these narrow band systems to magnetometer arrays where it is essential that cross talk between elements in the arrays be minimised.
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Publication status
- Published
ISSN
0951-3248Publisher
IOP PUBLISHING LTD, TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NXVolume
158Page range
663-666Presentation Type
- paper
Event name
3rd European Conference on Applied Superconductivity EUCAS'97: Institute of Physics Conference SeriesEvent location
VELDHOVEN, NETHERLANDS, JUN 30-JUL 03, 1997Event type
conferenceISBN
0-7503-0487-1Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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