3He melting pressure thermometry

Ni, Wei; Xia, J. S.; Haskins, P.S.; McKisson, J.

doi:10.1007/bf00754593

Cited by 12 publications

(10 citation statements)

References 6 publications

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“…The melting pressure of 3 He was chosen as the property on which the scale should be based because of the sensitivity and reliability with which it may be measured over a wide range, covering more than three decades of temperature, apart from a narrow region around the pressure minimum at 315.24 mK. It is a thermodynamic property with few complications arising from purity, etc., it provides an unambiguous universal definition, and is capable of being realised in laboratories around the world without the exchange of artefacts.…”

Section: The Melting Pressure Of 3 Hementioning

confidence: 99%

“…However, substantial differences existed even between the most recent of them, namely those of NIST (Gaithersburg) [2], the University of Florida [3], and PTB (Berlin) [4]. These amounted to about 0.3 % of T near 500 mK, rising to about 6 % of T at 0.9 mK.…”

Section: Introductionmentioning

confidence: 97%

“…These amounted to about 0.3 % of T near 500 mK, rising to about 6 % of T at 0.9 mK. In 1996 the Comité Consultatif de Thermométrie (CCT) initiated a collaboration among lowtemperature physicists in national laboratories and elsewhere to derive an equation for the melting pressure of 3 He which could be accepted for international use from 1 K to 0.9 mK, the Néel temperature of solid 3 He.…”

Section: Introductionmentioning

confidence: 99%

“…Over the years, several laboratories have developed 3 He melting-pressure scales covering various parts of the range. However, substantial differences existed even between the most recent of them, namely those of NIST (Gaithersburg) [2], the University of Florida [3], and PTB (Berlin) [4].…”

Section: Introductionmentioning

confidence: 99%

“…To make progress, a workshop was held in Leiden in August 1998, following which discussions took place mainly to see if thermodynamic calculation of 3 He melting pressures could indicate the source of the differences. In January 2000 the authors (apart from ALR and GS) met at NIST and were able to reduce the differences to a point where a compromise could be reached and the Provisional Low Temperature Scale, PLTS-2000, could be derived.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The Provisional Low Temperature Scale from 0.9 mK to 1 K, PLTS-2000

Rusby

Durieux

Reesink

et al. 2003

AIP Conference Proceedings

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The Provisional Low Temperature Scale from 0.9 mK to 1 K, PLTS-2000, was adopted by the Comité International des Poids et Mesures in October 2000. It is defined using an equation for the melting pressure of 3 He over the complete temperature range, and forms an extension of the International Temperature Scale of 1990, ITS-90, below its lower limit of 0.65 K. An internationally-accepted ultra-low temperature scale is needed to provide the basis for reliable thermometry in the temperature range in which commercial dilution refrigerators operate, and at lower temperatures where experiments investigating the thermodynamic properties of 3 He and other condensed matter are carried out in many research centres. This paper is a summary of a fuller publication describing the background and derivation of the scale, published in the Journal of Low Temperature Physics [1], and includes tables of values of melting pressure, p m / MPa, and temperature T 2000 / K, and the derivative, dp m /dT 2000 in MPa/K.

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Section: The Melting Pressure Of 3 Hementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Provisional Low Temperature Scale from 0.9 mK to 1 K, PLTS-2000

Rusby

Durieux

Reesink

et al. 2003

AIP Conference Proceedings

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First Observation of the Critical Size of Facets on 3He Crystals near 1 mK

Junes¹,

Alles²,

Parshin

et al. 2006

J Low Temp Phys

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Anomalous Resonance Frequency Shift of a Microelectromechanical Oscillator in Superfluid $$^3$$He-B

et al. 2017

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The mechanical resonance properties of a micro-electro-mechanical oscillator with a gap of 1.25 µm was studied in superfluid 3 He-B at various pressures. The oscillator was driven in the linear damping regime where the damping coefficient is independent of the oscillator velocity. The quality factor of the oscillator remains low (Q ≈ 80) down to 0.1 Tc, 4 orders of magnitude less than the intrinsic quality factor measured in vacuum at 4 K. In addition to the Boltzmann temperature dependent contribution to the damping, a damping proportional to temperature was found to dominate at low temperatures. We propose a multiple scattering mechanism of the surface Andreev bound states to be a possible cause for the anomalous damping.

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3He melting pressure thermometry

Cited by 12 publications

References 6 publications

The Provisional Low Temperature Scale from 0.9 mK to 1 K, PLTS-2000

The Provisional Low Temperature Scale from 0.9 mK to 1 K, PLTS-2000

First Observation of the Critical Size of Facets on 3He Crystals near 1 mK

Anomalous Resonance Frequency Shift of a Microelectromechanical Oscillator in Superfluid $$^3$$He-B

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