HTS rf-SQUID applications to geophysical exploration methods

SQUID systems offer an alternative to commonly used vector magnetometers (induction coils, fluxgate) in geophysical exploration methods like magnetotellurics (MT) and transient electromagnetics (TEM). The inherent broad frequency bandwidth (0.001 Hz to 50 kHz) and compact physical dimensions extend...

Full description

Saved in:
Bibliographic Details
Published in:Applied superconductivity 1997-07, Vol.5 (7), p.205-211
Main Authors: Kalberkamp, U., Matzander, U., Husemann, K.-D., Panaitow, G., Zimmermann, E., Zhang, Y.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:SQUID systems offer an alternative to commonly used vector magnetometers (induction coils, fluxgate) in geophysical exploration methods like magnetotellurics (MT) and transient electromagnetics (TEM). The inherent broad frequency bandwidth (0.001 Hz to 50 kHz) and compact physical dimensions extend the range of application. Systems using HTS rf-SQUIDs of the washer type with a combined analog–digital and fast analog feedback electronics have been developed to operate in the ambient earth's magnetic field. The noise spectra show an increase on both the exposure to the ambient field and movement in it compared to shielded conditions. A white noise level of 160 fT/sqrt(Hz) was achieved. Comparative measurements of TEM are shown.
ISSN:0964-1807
1879-1530
DOI:10.1016/S0964-1807(97)00046-X