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Magnetotelluric measurements

Description: The ideas of flux quantization and Josephson tunneling are reviewed, and the operation of the dc SQUID as a magnetometer is described. The SQUID currently used for magnetotellurics has a sensitivity of 10/sup -14/ T Hz/sup -1/2/, a dynamic range at 10/sup 7/ in a 1 Hz bandwidth, a frequency response from 0 to 40 kHz, and a slewing rate of 5 x 10/sup -5/T s/sup -1/. Recent improvements in sensitivity are discussed: SQUIDS are rapidly approaching the limit imposed by the uncertainty principle. Th… more
Date: June 1, 1980
Creator: Clarke, John & Goldstein, N. E.
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Partner: UNT Libraries Government Documents Department
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Experimental studies in solid state and low temperature physics. Final report for 1966-1980

Description: Experimental and theoretical investigations have been carried out in a broad area of low temperature and solid state physics which includes superconductivity, theory of quantum crystals (through 1973), magnetism in metals, and liquid helium. The work in superconductivity has involved investigations of the Josephson effect, studies of the pair-field susceptibility of superconductors and investigations of the thermodynamics of the superconducting phase transition. The competition between the meta… more
Date: June 1, 1980
Creator: Goldman, A. M.; Weyhmann, W. V. & Zimmermann, W., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A compact transportable Josephson voltage standard

Description: The development of a compact, portable 10 V Josephson calibration system is described. Its accuracy is the same as typical laboratory systems and its weight and volume are reduced by more than a factor of three. The new system will replace travelling voltage standards used within several NASA and DOE standards laboratories.
Date: June 1996
Creator: Hamilton, C. A.; Burroughs, C. J. & Kupferman, S. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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