Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems

Title: Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems

Full Record
Other Related Research

Abstract

A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.

Inventors:: Overton, Jr, W C; Steyert, Jr, W A

Issue Date:: 1981-05-22

OSTI Identifier:: 6386208

Application Number:: ON: DE83010465

Assignee:: EDB-83-077515

DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MAGNETIC SURVEYS; MAGNETOMETERS; DESIGN; SQUID DEVICES; BOREHOLES; REMOTE AREAS; CAVITIES; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; GEOPHYSICAL SURVEYS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; SUPERCONDUCTING DEVICES; SURVEYS; 420201* - Engineering- Cryogenic Equipment & Devices

Citation Formats


                    Overton, Jr, W C, and Steyert, Jr, W A. Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems.  United States: N. p., 1981. 
        Web.

Copy to clipboard


                    Overton, Jr, W C, & Steyert, Jr, W A. Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems.  United States.

Copy to clipboard


                    Overton, Jr, W C, and Steyert, Jr, W A. Fri .  
        "Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems".  United States.

Copy to clipboard


                    
@article{osti_6386208,

  title        = {Apparatus and method for detecting a magnetic anomaly contiguous to remote location by SQUID gradiometer and magnetometer systems},

  author       = {Overton, Jr, W C and Steyert, Jr, W A},

  abstractNote = {A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1981},

  month        = {5}

}

Copy to clipboard

Patent:

Search for the full text at the U.S. Patent and Trademark Office

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Apparatus for detecting a magnetic anomaly contiguous to remote location by squid gradiometer and magnetometer systems

Patent Overton, Jr., William C. (Los Alamos, NM); Steyert, Jr., William A. (Los Alamos, NM)

A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.
Full Text Available
Detection of a thin sheet magnetic anomaly by squid-gradiometer systems: possibility of hydrofracture azimuth determination

Conference Overton, Jr, W C

A study of the signal physics of magnetic anomaly detection was carried out by superconducting gradiometer and magnetometer loop systems with SQUID sensors for possible application to the LASL geothermal energy program. In particular, the crack produced by hydrofracture of a deep HDR geothermal borehole would be filled with a magnetic material such as ferrofluid. When polarized by the earth's field, this material would produce a localized crack magnetic anomaly which is characteristic of the azimuth of the vertical crack with respect to magnetic north. Signatures of the anomaly would be determined by taking rotation data before and after fillingmore »« less
Full Text Available
Feasibility of detecting artificial magnetic anomalies in hydrofractured rock by superconducting gradiometer-SQUID systems

Technical Report Overton, Jr, W C

A study of the signal physics of magnetic anomaly detection by superconducting gradiometer-SQUID systems to determine the feasibility of possible applications to the geothermal energy program is described. The system would make full use of the incredible sensitivity of the superconducting quantum interference device (SQUID) which can be in the range of 10/sup -11/ Oe. In addition to magnetic anomalies in the earth's field produced by spherical distributions of magnetic matter, anomalies that would be artificially produced by flooding magnetic material into cracks produced by hydrofracturing in deep boreholes drilled into dry rock geothermal sources are considered. The study indicatesmore »« less
DOI: https://doi.org/10.2172/7228213

Full Text Available
Apparatus and method for maintaining low temperatures about an object at a remote location. [Patent application]

Patent Steyert, Jr, W A; Overton, Jr, W C

The disclosure is directed to an apparatus and method for maintaining a body at cryogenic temperatures at a remote location such as down a borehole for an extended period of time. A housing contains a body comprising a material having a high specific heat at cryogenic temperatures such as between about 2 and 15 K. The body contains an orifice for containing an instrument or instruments operable at superconducting temperatures. The apparatus is precooled at the surface and lowered into a borehole to a desired depth, such as 2 to 3 miles. The instruments are operated, and the apparatus withdrawn,more »« less
A digital flux-locked loop for high temperature SQUID magnetometer and gradiometer systems with field cancellation

Conference Kraus, Jr, R H; Bracht, R; Flynn, E R [and others]

The SQUID sensor is typically operated in a null detector mode where an analogue flux-locked-loop, FLL, provides a negative feedback to maintain linear operation. The modulated SQUID signal is amplified, filtered, demodulated, and integrated in the FLL. The resulting analog signal is a measure of the magnetic field and noise at the SQUID and is also fed back to the modulation and feedback (M & F) coil to null the flux at the SQUID to maintain the linear operating point. Thus, the FLL output signal is proportional to the change in magnetic field at the SQUID pickup coil, provided themore »« less
Full Text Available

Similar Records