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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 Prance
We 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.

History

Publication status

  • Published

ISSN

0951-3248

Publisher

IOP PUBLISHING LTD, TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX

Volume

158

Page range

663-666

Presentation Type

  • paper

Event name

3rd European Conference on Applied Superconductivity EUCAS'97: Institute of Physics Conference Series

Event location

VELDHOVEN, NETHERLANDS, JUN 30-JUL 03, 1997

Event type

conference

ISBN

0-7503-0487-1

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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