Superconductive thermometric fixed points. Final report

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6445349

Soulen, Jr, R J

The authors review the progress since the 5th Temperature Symposium in the development of temperature reference points based upon the transitions of various metal samples between the normal and superconductive states. Two superconductive fixed point devices, known as SRM (Standard Reference Material) 767 and 768, have become available from the National Bureau of Standards. One of these devices provides five of the temperature reference points for the 1976 Provisional 0.5 K to 30 K Temperature Scale; the other provides the mechanism for transmitting an NBS cryogenic temperature scale covering the range 0.01 K to 0.5 K. Current efforts in superconductive fixed-point research are devoted to evaluating superconductive transitions as possible reference temperatures for a replacement scale to succeed the IPTS-68.

• Research Organization: National Bureau of Standards, Washington, DC (USA)
• OSTI ID: 6445349
• Report Number(s): PB-83-143453
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRYOGENICS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
MEASURING INSTRUMENTS
METALS
PHYSICAL PROPERTIES
RESEARCH PROGRAMS
STANDARDS
SUPERCONDUCTIVITY
TEMPERATURE MEASUREMENT
THERMODYNAMIC PROPERTIES
THERMOMETERS
TRANSITION TEMPERATURE