Precise Determination of Hydrostatic Pressure Correction Coefficient of Triple Point Cell of Water using Cryogenic Current Comparator Bridge

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概要

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• Applying a cryogenic current comparator bridge to resistance thermometry, the temperature distributions along the thermometer wells of two triple point cells of water are precisely measured using a standard platinum resistance thermometer with low measuring currents of about 0.1 mA. The average hydrostatic pressure coefficient of the two cells calculated from the temperature distributions is $-0.854(38)$ mK/m. This value agrees well with the reported value of $-0.856$ mK/m, but is not consistent with the recommended value of the International Temperature Scale of 1990, $-0.73$ mK/m.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2005-06-15

著者

• Sakurai Hirohisa

  Metrology Institute Of Japan Aist

• Nakanishi Masakazu

  Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan

関連論文

• Non-Uniqueness of the International Temperature Scale of 1990 in the Range 14 K to 433 K
• Improvement of Resistance Ratio Bridge Using Cryogenic Current Comparator by Operating with Low-Noise Voltage Amplifier Using Superconducting Quantum Interference Device for Low Resistance Measurements
• Precise Determination of Hydrostatic Pressure Correction Coefficient of Triple Point Cell of Water using Cryogenic Current Comparator Bridge

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