Nickel--chromium strain gages for cryogenic stress analysis of superconducting structures in high magnetic fields

Conference · Wed Oct 05 00:00:00 EDT 1977

OSTI ID:5295901

Freynik, Jr, H S; Roach, D R; Deis, D W; Hirzel, D G

Evaluation and calibration measurements were performed on commercial nickel-chromium metal-foil strain gages in a high-magnetic-field (12 T), liquid-helium (4.2 K) environment. The purpose was to fully characterize strain gages for use at cryogenic temperatures in high magnetic fields. In this study, the magnetoresistance of a number of strain gages was measured in three orthogonal directions at mechanical strain levels to 8900 ..mu..m/m. As a result, a unique calibration curve was defined for magnetoresistance strain errors that is independent of strain level and field direction to 12 T at 4.2 K. A current strain-gage application is the measurement of superconductor mechanical properties. These gages will soon be used in the stress analysis of superconducting fusion magnets during cooldown from ambient temperatures and during operation at 4.2 K with magnetic fields to 12 T.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5295901
• Report Number(s): UCRL-79726; CONF-771029-101; TRN: 78-003085
• Resource Relation: Conference: 7. symposium on fusion research project, Knoxville, TN, USA, 25 Oct 1977
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STRAIN GAGES
CALIBRATION
MAGNETORESISTANCE
SUPERCONDUCTING MAGNETS
STRESS ANALYSIS
CHROMIUM
EVALUATION
MAGNETIC FIELDS
NICKEL
ELECTRIC CONDUCTIVITY
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETS
ELEMENTS
EQUIPMENT
MAGNETS
MEASURING INSTRUMENTS
METALS
PHYSICAL PROPERTIES
SUPERCONDUCTING DEVICES
TRANSITION ELEMENTS
700202* - Fusion Power Plant Technology- Magnet Coils & Fields
420201 - Engineering- Cryogenic Equipment & Devices