The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Andrew J. Taberner - One of the best experts on this subject based on the ideXlab platform.
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EMBC - A vapor Pressure Thermometer for use in muscle microcalorimetry
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2011Co-Authors: Callum M. Johnston, Poul M. F. Nielsen, Ian W. Hunter, Andrew J. TabernerAbstract:Measurement of the energy consumption of isolated cardiac trabeculae requires highly sensitive temperature sensors. In this paper we describe and characterize an initial prototype of a vapor Pressure Thermometer being designed and built for application to muscle microcalorimetry. The device exploits the change in vapor Pressure with temperature of a solvent and the change in Pressure with volume of a gas. The sensor achieves a sensitivity of 86 μm/K and a resolution of 3.6 μK. Predictions from a finite element model of the expected displacement compare favorably with the tests performed.
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A vapor Pressure Thermometer for use in muscle microcalorimetry
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Callum M. Johnston, Poul M. F. Nielsen, Ian W. Hunter, Andrew J. TabernerAbstract:Measurement of the energy consumption of isolated cardiac trabeculae requires highly sensitive temperature sensors. In this paper we describe and characterize an initial prototype of a vapor Pressure Thermometer being designed and built for application to muscle microcalorimetry. The device exploits the change in vapor Pressure with temperature of a solvent and the change in Pressure with volume of a gas. The sensor achieves a sensitivity of 86 μm/K and a resolution of 3.6 μK. Predictions from a finite element model of the expected displacement compare favorably with the tests performed.
Y. Hermier - One of the best experts on this subject based on the ideXlab platform.
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realization of a 3he 4he vapor Pressure Thermometer for temperatures between 0 65 k and 5 k at lne cnam
International Journal of Thermophysics, 2011Co-Authors: F. Sparasci, L. Pitre, D. Truong, L. Risegari, Y. HermierAbstract:In the temperature range between 0.65 K and 5 K, the International Temperature Scale of 1990 (ITS-90) is based on 3He and 4He vapor-Pressure Thermometers. Between 0.65 K and 1 K, the ITS-90 overlaps with the Provisional Low Temperature Scale of 2000 (PLTS-2000), defined in term of the melting Pressure of 3He. Some differences, up to more than 1 mK, exist between the two scales in the overlapping interval. The LNE-CNAM has recently started the construction of a 3He–4He vapor-Pressure Thermometer to realize the ITS-90 in its lowest subrange at the highest degree of accuracy. The device is provided with two separate vapor-Pressure chambers, one for 3He and the other for 4He, built in a single copper block, and is installed in the experimental space of a dilution refrigerator. The vapor-Pressure Thermometer is designed to accommodate on the same copper block several transfer standards, an acoustic Thermometer, and the 3He melting-Pressure Thermometer. This configuration is intended for realizing calibrations of transfer standards down to 0.65 K, for investigating the possibility to extend the acoustic Thermometer below 4 K, and to perform a direct comparison between the ITS-90 and the PLTS-2000 in the overlapping temperature range, in order to study their differences. The realization of the system has been recently accomplished, and this report illustrates the characteristics of such an experimental device.
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Realization of a 3He–4He Vapor-Pressure Thermometer for Temperatures Between 0.65 K and 5 K at LNE-CNAM
International Journal of Thermophysics, 2011Co-Authors: F. Sparasci, L. Pitre, D. Truong, L. Risegari, Y. HermierAbstract:In the temperature range between 0.65 K and 5 K, the International Temperature Scale of 1990 (ITS-90) is based on 3He and 4He vapor-Pressure Thermometers. Between 0.65 K and 1 K, the ITS-90 overlaps with the Provisional Low Temperature Scale of 2000 (PLTS-2000), defined in term of the melting Pressure of 3He. Some differences, up to more than 1 mK, exist between the two scales in the overlapping interval. The LNE-CNAM has recently started the construction of a 3He–4He vapor-Pressure Thermometer to realize the ITS-90 in its lowest subrange at the highest degree of accuracy. The device is provided with two separate vapor-Pressure chambers, one for 3He and the other for 4He, built in a single copper block, and is installed in the experimental space of a dilution refrigerator. The vapor-Pressure Thermometer is designed to accommodate on the same copper block several transfer standards, an acoustic Thermometer, and the 3He melting-Pressure Thermometer. This configuration is intended for realizing calibrations of transfer standards down to 0.65 K, for investigating the possibility to extend the acoustic Thermometer below 4 K, and to perform a direct comparison between the ITS-90 and the PLTS-2000 in the overlapping temperature range, in order to study their differences. The realization of the system has been recently accomplished, and this report illustrates the characteristics of such an experimental device.
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Realization of a ^3He–^4He Vapor-Pressure Thermometer for Temperatures Between 0.65 K and 5 K at LNE-CNAM
International Journal of Thermophysics, 2011Co-Authors: F. Sparasci, L. Pitre, D. Truong, L. Risegari, Y. HermierAbstract:In the temperature range between 0.65 K and 5 K, the International Temperature Scale of 1990 (ITS-90) is based on ^3He and ^4He vapor-Pressure Thermometers. Between 0.65 K and 1 K, the ITS-90 overlaps with the Provisional Low Temperature Scale of 2000 (PLTS-2000), defined in term of the melting Pressure of ^3He. Some differences, up to more than 1 mK, exist between the two scales in the overlapping interval. The LNE-CNAM has recently started the construction of a ^3He–^4He vapor-Pressure Thermometer to realize the ITS-90 in its lowest subrange at the highest degree of accuracy. The device is provided with two separate vapor-Pressure chambers, one for ^3He and the other for ^4He, built in a single copper block, and is installed in the experimental space of a dilution refrigerator. The vapor-Pressure Thermometer is designed to accommodate on the same copper block several transfer standards, an acoustic Thermometer, and the ^3He melting-Pressure Thermometer. This configuration is intended for realizing calibrations of transfer standards down to 0.65 K, for investigating the possibility to extend the acoustic Thermometer below 4 K, and to perform a direct comparison between the ITS-90 and the PLTS-2000 in the overlapping temperature range, in order to study their differences. The realization of the system has been recently accomplished, and this report illustrates the characteristics of such an experimental device.
Hisashi Nakagawa - One of the best experts on this subject based on the ideXlab platform.
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Realization of PLTS-2000 for Low-Temperature Resistance Thermometer Calibration Services Below 650 mK
International Journal of Thermophysics, 2016Co-Authors: Hisashi NakagawaAbstract:In this study, the Provisional Low Temperature Scale of 2000 (PLTS-2000) was realized below 650 mK for the purpose of launching low-temperature resistance Thermometer calibration services in Japan. A Straty–Adams-type $$^{3}$$ 3 He melting Pressure Thermometer (MPT) and a dilution refrigerator were used to realize the PLTS-2000. Offsets due to hydrostatic Pressure head in a filling capillary line of the MPT were adjusted using the minimum Pressure fixed point on the $$^{3}$$ 3 He melting curve. A rather large MPT hysteresis between the decreasing and increasing Pressures was observed during Pressure calibration of the MPT and was the main source of uncertainty. The combined standard uncertainty ( $$k = 1$$ k = 1 ) between 50 mK and 650 mK was estimated to be in the range of 0.40 mK to 2.62 mK. The MPT and a number of resistance Thermometers with negative temperature coefficients were mounted on the experimental platform with a thermal connection to a mixing chamber and compared in a multiple-temperature-point calibration. The temperature range around the melting Pressure minimum, 250 mK to 400 mK, was not used for the calibration. The expanded uncertainty ( $$k = 2$$ k = 2 ) in the calibration based on realization of the PLTS-2000 between 50 mK and 650 mK was estimated to be in the range of 0.86 mK to 5.25 mK.
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Realization of PLTS-2000 for Low-Temperature Resistance Thermometer Calibration Services Below 650 mK
International Journal of Thermophysics, 2016Co-Authors: Hisashi NakagawaAbstract:In this study, the Provisional Low Temperature Scale of 2000 (PLTS-2000) was realized below 650 mK for the purpose of launching low-temperature resistance Thermometer calibration services in Japan. A Straty–Adams-type \(^{3}\)He melting Pressure Thermometer (MPT) and a dilution refrigerator were used to realize the PLTS-2000. Offsets due to hydrostatic Pressure head in a filling capillary line of the MPT were adjusted using the minimum Pressure fixed point on the \(^{3}\)He melting curve. A rather large MPT hysteresis between the decreasing and increasing Pressures was observed during Pressure calibration of the MPT and was the main source of uncertainty. The combined standard uncertainty (\(k = 1\)) between 50 mK and 650 mK was estimated to be in the range of 0.40 mK to 2.62 mK. The MPT and a number of resistance Thermometers with negative temperature coefficients were mounted on the experimental platform with a thermal connection to a mixing chamber and compared in a multiple-temperature-point calibration. The temperature range around the melting Pressure minimum, 250 mK to 400 mK, was not used for the calibration. The expanded uncertainty (\(k = 2\)) in the calibration based on realization of the PLTS-2000 between 50 mK and 650 mK was estimated to be in the range of 0.86 mK to 5.25 mK.
Callum M. Johnston - One of the best experts on this subject based on the ideXlab platform.
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EMBC - A vapor Pressure Thermometer for use in muscle microcalorimetry
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2011Co-Authors: Callum M. Johnston, Poul M. F. Nielsen, Ian W. Hunter, Andrew J. TabernerAbstract:Measurement of the energy consumption of isolated cardiac trabeculae requires highly sensitive temperature sensors. In this paper we describe and characterize an initial prototype of a vapor Pressure Thermometer being designed and built for application to muscle microcalorimetry. The device exploits the change in vapor Pressure with temperature of a solvent and the change in Pressure with volume of a gas. The sensor achieves a sensitivity of 86 μm/K and a resolution of 3.6 μK. Predictions from a finite element model of the expected displacement compare favorably with the tests performed.
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A vapor Pressure Thermometer for use in muscle microcalorimetry
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Callum M. Johnston, Poul M. F. Nielsen, Ian W. Hunter, Andrew J. TabernerAbstract:Measurement of the energy consumption of isolated cardiac trabeculae requires highly sensitive temperature sensors. In this paper we describe and characterize an initial prototype of a vapor Pressure Thermometer being designed and built for application to muscle microcalorimetry. The device exploits the change in vapor Pressure with temperature of a solvent and the change in Pressure with volume of a gas. The sensor achieves a sensitivity of 86 μm/K and a resolution of 3.6 μK. Predictions from a finite element model of the expected displacement compare favorably with the tests performed.
F. Sparasci - One of the best experts on this subject based on the ideXlab platform.
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realization of a 3he 4he vapor Pressure Thermometer for temperatures between 0 65 k and 5 k at lne cnam
International Journal of Thermophysics, 2011Co-Authors: F. Sparasci, L. Pitre, D. Truong, L. Risegari, Y. HermierAbstract:In the temperature range between 0.65 K and 5 K, the International Temperature Scale of 1990 (ITS-90) is based on 3He and 4He vapor-Pressure Thermometers. Between 0.65 K and 1 K, the ITS-90 overlaps with the Provisional Low Temperature Scale of 2000 (PLTS-2000), defined in term of the melting Pressure of 3He. Some differences, up to more than 1 mK, exist between the two scales in the overlapping interval. The LNE-CNAM has recently started the construction of a 3He–4He vapor-Pressure Thermometer to realize the ITS-90 in its lowest subrange at the highest degree of accuracy. The device is provided with two separate vapor-Pressure chambers, one for 3He and the other for 4He, built in a single copper block, and is installed in the experimental space of a dilution refrigerator. The vapor-Pressure Thermometer is designed to accommodate on the same copper block several transfer standards, an acoustic Thermometer, and the 3He melting-Pressure Thermometer. This configuration is intended for realizing calibrations of transfer standards down to 0.65 K, for investigating the possibility to extend the acoustic Thermometer below 4 K, and to perform a direct comparison between the ITS-90 and the PLTS-2000 in the overlapping temperature range, in order to study their differences. The realization of the system has been recently accomplished, and this report illustrates the characteristics of such an experimental device.
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Realization of a 3He–4He Vapor-Pressure Thermometer for Temperatures Between 0.65 K and 5 K at LNE-CNAM
International Journal of Thermophysics, 2011Co-Authors: F. Sparasci, L. Pitre, D. Truong, L. Risegari, Y. HermierAbstract:In the temperature range between 0.65 K and 5 K, the International Temperature Scale of 1990 (ITS-90) is based on 3He and 4He vapor-Pressure Thermometers. Between 0.65 K and 1 K, the ITS-90 overlaps with the Provisional Low Temperature Scale of 2000 (PLTS-2000), defined in term of the melting Pressure of 3He. Some differences, up to more than 1 mK, exist between the two scales in the overlapping interval. The LNE-CNAM has recently started the construction of a 3He–4He vapor-Pressure Thermometer to realize the ITS-90 in its lowest subrange at the highest degree of accuracy. The device is provided with two separate vapor-Pressure chambers, one for 3He and the other for 4He, built in a single copper block, and is installed in the experimental space of a dilution refrigerator. The vapor-Pressure Thermometer is designed to accommodate on the same copper block several transfer standards, an acoustic Thermometer, and the 3He melting-Pressure Thermometer. This configuration is intended for realizing calibrations of transfer standards down to 0.65 K, for investigating the possibility to extend the acoustic Thermometer below 4 K, and to perform a direct comparison between the ITS-90 and the PLTS-2000 in the overlapping temperature range, in order to study their differences. The realization of the system has been recently accomplished, and this report illustrates the characteristics of such an experimental device.
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Realization of a ^3He–^4He Vapor-Pressure Thermometer for Temperatures Between 0.65 K and 5 K at LNE-CNAM
International Journal of Thermophysics, 2011Co-Authors: F. Sparasci, L. Pitre, D. Truong, L. Risegari, Y. HermierAbstract:In the temperature range between 0.65 K and 5 K, the International Temperature Scale of 1990 (ITS-90) is based on ^3He and ^4He vapor-Pressure Thermometers. Between 0.65 K and 1 K, the ITS-90 overlaps with the Provisional Low Temperature Scale of 2000 (PLTS-2000), defined in term of the melting Pressure of ^3He. Some differences, up to more than 1 mK, exist between the two scales in the overlapping interval. The LNE-CNAM has recently started the construction of a ^3He–^4He vapor-Pressure Thermometer to realize the ITS-90 in its lowest subrange at the highest degree of accuracy. The device is provided with two separate vapor-Pressure chambers, one for ^3He and the other for ^4He, built in a single copper block, and is installed in the experimental space of a dilution refrigerator. The vapor-Pressure Thermometer is designed to accommodate on the same copper block several transfer standards, an acoustic Thermometer, and the ^3He melting-Pressure Thermometer. This configuration is intended for realizing calibrations of transfer standards down to 0.65 K, for investigating the possibility to extend the acoustic Thermometer below 4 K, and to perform a direct comparison between the ITS-90 and the PLTS-2000 in the overlapping temperature range, in order to study their differences. The realization of the system has been recently accomplished, and this report illustrates the characteristics of such an experimental device.