Hierarchical Equations of Motion in the Libra Software Package

Temen, Story; Jain, Amber; Akimov, Alexey V.

doi:10.22541/au.158739956.60344689

Cited by 1 publication

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“…This manometer was described by Oyama [2] at the 5th Meeting of the ComitC Consultatif de ThermomBtrie (CCT) held in 1958. At the same meeting, a separate plan to develop an accurate manometer with a similar interferometric method was described by Terrien of the BIPM [3,4].…”

Section: Introductionmentioning

confidence: 99%

New Mercury Interferometric Baromanometer as the Primary Pressure Standard of Japan

Ooiwa¹,

Ueki²,

Kaneda³

1994

Metrologia

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The mercury U-tube manometer is a traditional pressure-measuring instrument and has played an important role as the primary standard in the atmospheric pressure range. It has also been used as the basis of standards for other pressure ranges. About thirty-five years ago, the National Research Laboratory of Metrology developed the precise mercury manometer using a white-light Michelson interferometer to detect the mercury menisci. We now introduce a new mercury U-tube manometer, developed as a national primary standard, to which some improvements and refinements have been added. Though the central principle is the same, the optical path of the reference arm of the interferometer has been redesigned to reduce the index-of-refraction corrections and some improvements have been incorporated to achieve more precise measurements on the U-tube conditions. The pressure range of the new manometer is 116 kPa and the uncertainty at 100 kPa is estimated to be about 0,4 Pa, in both absolute and gauge modes.

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Section: Introductionmentioning

confidence: 99%