Performance of a High-Temperature Superconducting Resonator for High-Field Imaging

The practicalities involved with the use of a superconducting microimaging probe are outlined so that the power and problems associated with this technology can be assessed. The nonlinearity of the transmission characteristics of this class of probe, the intrinsic limits on bandwidth, the long ring-...

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Bibliographic Details
Published in:Journal of magnetic resonance. Series A 1995-03, Vol.113 (1), p.74-80
Main Authors: Black, R.D., Early, T.A., Johnson, G.A.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Magnetic force microscopes
Physics
Scanning probe microscopes, components and techniques
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Summary:The practicalities involved with the use of a superconducting microimaging probe are outlined so that the power and problems associated with this technology can be assessed. The nonlinearity of the transmission characteristics of this class of probe, the intrinsic limits on bandwidth, the long ring-down times, the potential for spin damping, and the difficulties of suppressing Johnson noise are all discussed. Recent refinements that have delivered a factor of 30 gain in SNR (signal-to-noise ratio) relative to copper coils at room temperature are presented. Further reductions in noise sources should yield a gain of a factor of 60 in SNR.
ISSN:1064-1858
1096-0864
DOI:10.1006/jmra.1995.1058