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Low uncertainty Boltzmann constant determinations and the kelvin redefinition
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| Zeitschriftentitel: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
|---|---|
| Personen und Körperschaften: | |
| In: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374, 2016, 2064, S. 20150038 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
The Royal Society
|
| Schlagwörter: |
| author_facet |
Fischer, J. Fischer, J. |
|---|---|
| author |
Fischer, J. |
| spellingShingle |
Fischer, J. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Low uncertainty Boltzmann constant determinations and the kelvin redefinition General Physics and Astronomy General Engineering General Mathematics |
| author_sort |
fischer, j. |
| spelling |
Fischer, J. 1364-503X 1471-2962 The Royal Society General Physics and Astronomy General Engineering General Mathematics http://dx.doi.org/10.1098/rsta.2015.0038 <jats:p> At its 25th meeting, the General Conference on Weights and Measures (CGPM) approved Resolution 1 ‘On the future revision of the International System of Units, the SI’, which sets the path towards redefinition of four base units at the next CGPM in 2018. This constitutes a decisive advance towards the formal adoption of the new SI and its implementation. Kilogram, ampere, kelvin and mole will be defined in terms of fixed numerical values of the Planck constant, elementary charge, Boltzmann constant and Avogadro constant, respectively. The effect of the new definition of the kelvin referenced to the value of the Boltzmann constant <jats:italic>k</jats:italic> is that the kelvin is equal to the change of thermodynamic temperature <jats:italic>T</jats:italic> that results in a change of thermal energy <jats:italic>kT</jats:italic> by 1.380 65×10 <jats:sup>−23</jats:sup> J. A value of the Boltzmann constant suitable for defining the kelvin is determined by fundamentally different primary thermometers such as acoustic gas thermometers, dielectric constant gas thermometers, noise thermometers and the Doppler broadening technique. Progress to date of the measurements and further perspectives are reported. Necessary conditions to be met before proceeding with changing the definition are given. The consequences of the new definition of the kelvin on temperature measurement are briefly outlined. </jats:p> Low uncertainty Boltzmann constant determinations and the kelvin redefinition Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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| title |
Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_unstemmed |
Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_full |
Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_fullStr |
Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
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Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_short |
Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_sort |
low uncertainty boltzmann constant determinations and the kelvin redefinition |
| topic |
General Physics and Astronomy General Engineering General Mathematics |
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http://dx.doi.org/10.1098/rsta.2015.0038 |
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2016 |
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<jats:p>
At its 25th meeting, the General Conference on Weights and Measures (CGPM) approved Resolution 1 ‘On the future revision of the International System of Units, the SI’, which sets the path towards redefinition of four base units at the next CGPM in 2018. This constitutes a decisive advance towards the formal adoption of the new SI and its implementation. Kilogram, ampere, kelvin and mole will be defined in terms of fixed numerical values of the Planck constant, elementary charge, Boltzmann constant and Avogadro constant, respectively. The effect of the new definition of the kelvin referenced to the value of the Boltzmann constant
<jats:italic>k</jats:italic>
is that the kelvin is equal to the change of thermodynamic temperature
<jats:italic>T</jats:italic>
that results in a change of thermal energy
<jats:italic>kT</jats:italic>
by 1.380 65×10
<jats:sup>−23</jats:sup>
J. A value of the Boltzmann constant suitable for defining the kelvin is determined by fundamentally different primary thermometers such as acoustic gas thermometers, dielectric constant gas thermometers, noise thermometers and the Doppler broadening technique. Progress to date of the measurements and further perspectives are reported. Necessary conditions to be met before proceeding with changing the definition are given. The consequences of the new definition of the kelvin on temperature measurement are briefly outlined.
</jats:p> |
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| description | <jats:p> At its 25th meeting, the General Conference on Weights and Measures (CGPM) approved Resolution 1 ‘On the future revision of the International System of Units, the SI’, which sets the path towards redefinition of four base units at the next CGPM in 2018. This constitutes a decisive advance towards the formal adoption of the new SI and its implementation. Kilogram, ampere, kelvin and mole will be defined in terms of fixed numerical values of the Planck constant, elementary charge, Boltzmann constant and Avogadro constant, respectively. The effect of the new definition of the kelvin referenced to the value of the Boltzmann constant <jats:italic>k</jats:italic> is that the kelvin is equal to the change of thermodynamic temperature <jats:italic>T</jats:italic> that results in a change of thermal energy <jats:italic>kT</jats:italic> by 1.380 65×10 <jats:sup>−23</jats:sup> J. A value of the Boltzmann constant suitable for defining the kelvin is determined by fundamentally different primary thermometers such as acoustic gas thermometers, dielectric constant gas thermometers, noise thermometers and the Doppler broadening technique. Progress to date of the measurements and further perspectives are reported. Necessary conditions to be met before proceeding with changing the definition are given. The consequences of the new definition of the kelvin on temperature measurement are briefly outlined. </jats:p> |
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| spelling | Fischer, J. 1364-503X 1471-2962 The Royal Society General Physics and Astronomy General Engineering General Mathematics http://dx.doi.org/10.1098/rsta.2015.0038 <jats:p> At its 25th meeting, the General Conference on Weights and Measures (CGPM) approved Resolution 1 ‘On the future revision of the International System of Units, the SI’, which sets the path towards redefinition of four base units at the next CGPM in 2018. This constitutes a decisive advance towards the formal adoption of the new SI and its implementation. Kilogram, ampere, kelvin and mole will be defined in terms of fixed numerical values of the Planck constant, elementary charge, Boltzmann constant and Avogadro constant, respectively. The effect of the new definition of the kelvin referenced to the value of the Boltzmann constant <jats:italic>k</jats:italic> is that the kelvin is equal to the change of thermodynamic temperature <jats:italic>T</jats:italic> that results in a change of thermal energy <jats:italic>kT</jats:italic> by 1.380 65×10 <jats:sup>−23</jats:sup> J. A value of the Boltzmann constant suitable for defining the kelvin is determined by fundamentally different primary thermometers such as acoustic gas thermometers, dielectric constant gas thermometers, noise thermometers and the Doppler broadening technique. Progress to date of the measurements and further perspectives are reported. Necessary conditions to be met before proceeding with changing the definition are given. The consequences of the new definition of the kelvin on temperature measurement are briefly outlined. </jats:p> Low uncertainty Boltzmann constant determinations and the kelvin redefinition Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
| spellingShingle | Fischer, J., Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Low uncertainty Boltzmann constant determinations and the kelvin redefinition, General Physics and Astronomy, General Engineering, General Mathematics |
| title | Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_full | Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_fullStr | Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_full_unstemmed | Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_short | Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| title_sort | low uncertainty boltzmann constant determinations and the kelvin redefinition |
| title_unstemmed | Low uncertainty Boltzmann constant determinations and the kelvin redefinition |
| topic | General Physics and Astronomy, General Engineering, General Mathematics |
| url | http://dx.doi.org/10.1098/rsta.2015.0038 |