Further Measurements of Thermodynamic Temperature Using a Total Radiation Thermometer: the Range - 130°C to +60°C

Martin, John; Quinn, T J; Chu, Brian

doi:10.1088/0026-1394/25/2/008

Cited by 35 publications

(40 citation statements)

References 7 publications

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“…The results obtained before 1990 and used in the formulation of ITS-90 are generally scattered fairly symmetrically about the base line while, as observed above, ours deviate markedly. We do, however, •, This work with error bars showing ± one standard deviation; •, NIST acoustic thermometry; (2) , NBS gas thermometry; (3) ♦, NML gas thermometry; (4) , NPL total radiation thermometry; (5) , PRMI gas thermometry; (6) -, equation (21).…”

Section: Discussionmentioning

confidence: 96%

Primary acoustic thermometry betweenT= 90 K andT= 300 K

Ewing

Trusler

2000

The Journal of Chemical Thermodynamics

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Section: Discussionmentioning

confidence: 96%

Primary acoustic thermometry betweenT= 90 K andT= 300 K

Ewing

Trusler

2000

The Journal of Chemical Thermodynamics

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“…Two other CVGT experiments in the range (Steur [5], up to 100 K and Kemp [4], up to 287 K), together with the original Astrov [30] CVGT and Quinn and Martin's [24] total radiation thermometry, constituted the main ingredients for the construction of the ITS-90. The principal problem in this temperature range is the disagreement between the gas thermometry work of Astrov and of Kemp, see Fig.…”

Section: Low-temperature Constant-volume Gas Thermometrymentioning

confidence: 99%

“…WG4 examined several effects that could have contributed to the difference. Astrov et al [8] Guildner & Edsinger [6] Edsinger & Schooley [7] Kemp et al [4] Quinn et al [24] Moldover et al [11] Strouse et al [13] Ewing & Trusler [10] Benedetto et al [14] Pitre et al [15] Ripple et al [12] (T68 -T90)…”

Section: Low-temperature Constant-volume Gas Thermometrymentioning

confidence: 99%

“…The acoustic measurements denoted by blue or brown symbols can be seen in more detail in Fig. 2 Guildner & Edsinger [6] Astrov et al [8] Kemp et al [4] Quinn et al [24] Fox et al [17] Stock et al [18] Taubert et al [19] Noulkhow et al [20] Goebel et al [22] Yoon et al [21] Fischer & Jung [16] Moldover et al [11] Ewing & Trusler [10] Strouse et al [13] Ripple et al [12] Benedetto et al [14] Pitre et al [15] Edler et al [25] Labenski et al [26] various [23] (T68 -T90) ITS-90, +u (k = 1) ITS-90, -u (k = 1) mean smooth function …”

Section: Introductionmentioning

confidence: 99%

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Present Estimates of the Differences Between Thermodynamic Temperatures and the ITS-90

Fischer

Podesta

Hill³

et al. 2011

Int J Thermophys

129

165

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At the request of the Consultative Committee for Thermometry (CCT), Working Group 4 (WG4) has critically reviewed all available measurements of the differences between thermodynamic and ITS-90 temperatures, (T − T 90 ), and documented the conversion of older data to the ITS-90. Particular attention has been given to the uncertainties. Based on this review, we provide consensus estimates of T − T 90 for selected measurements from 0.65 K to 1358 K. We provide two analytic functions for T − T 90 , one for use from 8 K to the triple point of water (T TPW ) and one for use above T TPW . The small discontinuity of the derivative dT 90 /dT at T TPW is discussed.J. Fischer (B) · L. Wolber PTB,We also identify temperature ranges where researchers are encouraged to undertake high-accuracy measurements of T − T 90 .

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“…For example, in the establishment of ITS-90 in this temperature range (which included no data from acoustic thermometry), data from constant-volume gas thermometry (CVGT) [6,7] were used, along with data from a cryogenic radiometer (CR) [8,9]. These differing methods disagreed with each other by more than their combined uncertainties, so clearly there was a problem with one or both of the methods.…”

Section: Motivationmentioning

confidence: 99%

The Limits of a Rayleigh-Scattering Primary Thermometer

Podesta

Edwards

2008

Int J Thermophys

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Progress in the development of an apparatus to compare the thermodynamic temperature of a gas with the temperature as determined by the International Temperature Scale of 1990 (ITS-90) is reported. The apparatus uses the Rayleigh scattering of light from a gas to provide an intensive measure of gas density, thus avoiding the need for corrections for dead volumes or wall adsorption required by conventional gas thermometry. A laser beam is shone through gas in two cells that are at the same pressure but different temperatures, and the measured ratio of the Rayleigh scattering signals from the two cells can be related to the ratio of the gas density in the cells. From the density ratio, the thermodynamic temperature of one cell can be inferred if the other cell is held close to the triple point of water. However, the Rayleigh scattering is weak and signals are small, making measurements with sufficiently small uncertainty extremely challenging. Since previous reports, the apparatus has been significantly modified, and these changes are described along with indicative results. In this paper, results of measurements in the range from 211 K to 292 K using both argon and xenon are reported. The results suffer from large systematic errors due to contamination in one of the measurement cells. Although the results do not provide reliable estimates of T − T 90 , they indicate that measurements with uncertainties below 1 mK are feasible.

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Further Measurements of Thermodynamic Temperature Using a Total Radiation Thermometer: the Range - 130°C to +60°C

Cited by 35 publications

References 7 publications

Primary acoustic thermometry betweenT= 90 K andT= 300 K

Primary acoustic thermometry betweenT= 90 K andT= 300 K

Present Estimates of the Differences Between Thermodynamic Temperatures and the ITS-90

The Limits of a Rayleigh-Scattering Primary Thermometer

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