Apparatus and method for characterizing conductivity of materials

Patent · Wed Apr 13 04:00:00 EDT 1988

OSTI ID:6284551

Doss, J. D.

Apparatus and method for noncontact, radio-frequency shielding current characterization of materials. Self- or mutual inductance changes in one or more inductive elements, respectively, occur when materials capable of supporting shielding currents are placed in proximity thereto, or undergo change in resistivity while in place. Such changes can be observed by incorporating the inductor(s) in a resonant circuit and determining the frequency of oscillation or by measuring the voltage induced on a coupled inductive element. The present invention is useful for determining the critical temperature and superconducting transition width for superconducting samples. 8 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7181451
• Application Number: ON: DE89009599
• OSTI ID: 6284551
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
CRITICAL FIELD
DESIGN
EDDY CURRENT TESTING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC TESTING
ELECTRONIC CIRCUITS
INVENTIONS
MAGNETIC FIELDS
MATERIALS TESTING
MEASURING INSTRUMENTS
NONDESTRUCTIVE TESTING
OSCILLATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TESTING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE