Comparison of some glass thermometers at low temperatures in a high magnetic field

Journal Article · Tue Dec 01 04:00:00 EST 1987 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139335· OSTI ID:5951192

Wiegers, S A.J.; Jochemsen, R; Kranenburg, C C; Frossati, G

We have compared the low-frequency capacitance of glass thermometers of various shapes, made of very pure SiO/sub 2/ doped with approx. =1200 ppm OH/sup -/, in the temperature range of 4--100 mK in a magnetic field of 9 T. The construction of the electrodes, the way the contacts are made, and the connection of the leads or cables influence both the voltage and the field dependence of the capacitance and of the loss. We have been able to construct capacitive glass thermometers of which the capacitance is not shifted in a field of 9 T at temperatures down to 4 mK, within our temperature accuracy of approx. =5%. This has been determined by comparison with a cerium magnesium nitrate (CMN) thermometer in a field-free region, and by comparing ultrasound measurements versus the thermometer capacitance with and without a magnetic field.

• Research Organization: Kamerlingh Onnes Laboratorium, Rijksuniversiteit Leiden, P. O. Box 9506, 2300 RA Leiden, The Netherlands
• OSTI ID: 5951192
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 58:12; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CAPACITANCE
COMPARATIVE EVALUATIONS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
MAGNETIC FIELDS
MEASURING INSTRUMENTS
PERFORMANCE
PHYSICAL PROPERTIES
RESISTORS
THERMOMETERS