DocumentCode :
1023200
Title :
SQUID-based rock magnetometer with open-ended horizontal room-temperature access
Author :
Brake, H. J M ter ; la Court, P.d. ; Lenferink, A.T.M. ; Ulfman, J.A. ; Flokstra, J.
Author_Institution :
University of Twente, The Netherlands
Volume :
23
Issue :
2
fYear :
1987
fDate :
3/1/1987 12:00:00 AM
Firstpage :
1110
Lastpage :
1113
Abstract :
We constructed a 3-channel SQUID-based rock magnetometer with an open-ended horizontal room-temperature access having an inner diameter of 38 mm. A refrigerator is incorporated for cooling two radiation shields so that an operating time can be realized of about 10 weeks with a reservoir volume of 26.7 litres. The temperature variation along the access is about 9 K. The rock magnetometer is equipped with a special sensing-coil set of which the signal uniformity with respect to magnetic dipoles is about a factor of two better than that of conventional vertical-access systems. The intrinsic noise level of the system is 10-11Am2/ 
.
.Keywords :
Geomagnetism; Magnetometers, superconducting; Cryogenics; Helium; Magnetic field measurement; Noise level; Refrigeration; Reservoirs; SQUID magnetometers; Superconducting magnets; Temperature sensors; Thermal conductivity;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1987.1064928
Filename :
1064928
Link To Document :
