Simple differential thermometer for low temperatures using a thermocouple with a SQUID detector

Journal Article · Mon Aug 01 00:00:00 EDT 1983 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1137507· OSTI ID:5943819

Maeno, Y; Haucke, H; Wheatley, J

Details of design and construction of a simple and rugged thermocouple differential thermometer are presented. Gold +0.03 at. % iron wire is used, with niobium leads connected to a SQUID. It is demonstrated that at 1 K the response time is about 15 ms and that the temperature sensitivity of 10/sup -7/ K with a 10-Hz filter is Johnson-noise limited. Additional qualities such as small size, little self-heating, and high reproducibility make this device ideal for differential thermometry at low temperatures.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5943819
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 54:8; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DESIGN
DIFFERENTIAL THERMAL ANALYSIS
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FILTERS
FLUXMETERS
FREQUENCY RANGE
FUNCTIONS
GOLD
HZ RANGE
IRON
MEASURING INSTRUMENTS
METALS
MICROWAVE EQUIPMENT
NIOBIUM
NOISE
PERFORMANCE
QUANTITY RATIO
RESPONSE FUNCTIONS
SENSITIVITY
SIZE
SQUID DEVICES
SUPERCONDUCTING DEVICES
THERMAL ANALYSIS
THERMOCOUPLES
THERMOMETERS
TRANSITION ELEMENTS
ULTRALOW TEMPERATURE
WIRES