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Title: Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing

Abstract

Gravitational acceleration is measured in all spatial dimensions with improved sensitivity by utilizing a high temperature superconducting (HTS) gravimeter. The HTS gravimeter is comprised of a permanent magnet suspended in a spaced relationship from a high temperature superconductor, and a cantilever having a mass at its free end is connected to the permanent magnet at its fixed end. The permanent magnet and superconductor combine to form a bearing platform with extremely low frictional losses, and the rotational displacement of the mass is measured to determine gravitational acceleration. Employing a high temperature superconductor component has the significant advantage of having an operating temperature at or below 77K, whereby cooling may be accomplished with liquid nitrogen.

Inventors:
 [1]
  1. Downers Grove, IL
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
873053
Patent Number(s):
US 6079267
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; measuring; gravitational; acceleration; utilizing; temperature; superconducting; bearing; measured; spatial; dimensions; improved; sensitivity; gravimeter; comprised; permanent; magnet; suspended; spaced; relationship; superconductor; cantilever; mass; free; connected; fixed; combine; form; platform; extremely; frictional; losses; rotational; displacement; determine; employing; component; significant; advantage; operating; below; 77k; whereby; cooling; accomplished; liquid; nitrogen; superconducting bearing; spaced relationship; improved sensitivity; spaced relation; temperature superconductor; permanent magnet; operating temperature; temperature superconducting; liquid nitrogen; rotational displacement; significant advantage; gravitational acceleration; superconductor component; /73/74/310/

Citation Formats

Hull, John R. Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing. United States: N. p., 2000. Web.
Hull, John R. Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing. United States.
Hull, John R. Sat . "Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing". United States. https://www.osti.gov/servlets/purl/873053.
@article{osti_873053,
title = {Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing},
author = {Hull, John R},
abstractNote = {Gravitational acceleration is measured in all spatial dimensions with improved sensitivity by utilizing a high temperature superconducting (HTS) gravimeter. The HTS gravimeter is comprised of a permanent magnet suspended in a spaced relationship from a high temperature superconductor, and a cantilever having a mass at its free end is connected to the permanent magnet at its fixed end. The permanent magnet and superconductor combine to form a bearing platform with extremely low frictional losses, and the rotational displacement of the mass is measured to determine gravitational acceleration. Employing a high temperature superconductor component has the significant advantage of having an operating temperature at or below 77K, whereby cooling may be accomplished with liquid nitrogen.},
doi = {},
url = {https://www.osti.gov/biblio/873053}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

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