DocumentCode
835435
Title
Sampling method to extend bandwidth of scanning SQUID microscopes
Author
Matthews, J. ; Vlahacos, C.P. ; Kwon, S.P. ; Wellstood, F.C.
Author_Institution
Coll. Park, Univ. of Maryland, College Park, MD, USA
Volume
15
Issue
2
fYear
2005
fDate
6/1/2005 12:00:00 AM
Firstpage
688
Lastpage
691
Abstract
We present preliminary results on the development of a 4.2 K scanning SQUID microscope with a bandwidth in the GHz range. We have overcome the bandwidth limitations of traditional scanning SQUID microscopes, which use a flux-locked loop, by using a hysteretic SQUID and a pulsed sampling technique. We describe the overall design and operation of our measurement system, and present high-speed measurement results.
Keywords
SQUID magnetometers; magnetic fields; microscopes; 4.2 K; GHz range bandwidth; bandwidth extension; bandwidth limitations; hysteretic SQUID; pulsed sampling technique; scanning SQUID microscopes; Bandwidth; Frequency; Hysteresis; Image sampling; Magnetic fields; Microscopy; Pulse amplifiers; SQUIDs; Sampling methods; Voltage; High frequency; NDE; SQUID; microscopy;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2005.850003
Filename
1439731
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