Currently almost all temperature measurement around the world is based on traceability to a defined scale, either the International Temperature Scale of 1990, ITS-90 or, below 1 K, the Provisional Low Temperature Scale of 2000, PLTS-2000. These scales are empirical in basis, reliant upon a set of fixed points whose temperatures were determined a priori by primary thermometry. However recent technical advances in temperature metrology, the advent of the evolving mise en pratique for the definition of the kelvin (MeP-K) and the forthcoming kelvin redefinition in terms of a fixed value of the Boltzmann constant provide a unique opportunity to fundamentally change the practice of temperature measurement. In the light of this a European Metrology Research Programme project, known as Implementing the new kelvin (InK), was established; the first phase of which was from Oct 2012 to September 2015. The project has 13 partners and 8 collaborators/universities from around the world working in the field of primary thermometry. The research to be performed in the InK project has two main thrusts: The development of primary thermometry methods that both challenge and supplant the defined scales at high (>1000 C) and low (<1 K) temperatures. This will enable, for the first time, and at these temperature extremes, to directly realise and disseminate thermodynamic temperature, with uncertainties that are competitive with the defined scales. Between these temperatures new values of T – T90 (by a variety of methods) with the lowest uncertainties (1 mK) will be determined. This is required for several reasons: a) in the short term to provide ultra-reliable T – T90 data for the MeP-K, b) to develop the primary thermometry techniques needed to progressively supplant defined scales and c) provide the background thermodynamic temperature data required for any successor temperature scale, namely ITS20XX. This presentation will give an overview of the project, initial results will be presented and its impact into world thermometry will be discussed.
The Euramet Metrology Research Programme Project: Implementing the new kelvin (InK) / G., Machin; J., Engert; Gavioso, Roberto; M., Sadli; E., Woolliams. - (2015). (Intervento presentato al convegno Temperature 2015 tenutosi a St. Petersburg nel april 2015).
The Euramet Metrology Research Programme Project: Implementing the new kelvin (InK)
GAVIOSO, ROBERTO;
2015
Abstract
Currently almost all temperature measurement around the world is based on traceability to a defined scale, either the International Temperature Scale of 1990, ITS-90 or, below 1 K, the Provisional Low Temperature Scale of 2000, PLTS-2000. These scales are empirical in basis, reliant upon a set of fixed points whose temperatures were determined a priori by primary thermometry. However recent technical advances in temperature metrology, the advent of the evolving mise en pratique for the definition of the kelvin (MeP-K) and the forthcoming kelvin redefinition in terms of a fixed value of the Boltzmann constant provide a unique opportunity to fundamentally change the practice of temperature measurement. In the light of this a European Metrology Research Programme project, known as Implementing the new kelvin (InK), was established; the first phase of which was from Oct 2012 to September 2015. The project has 13 partners and 8 collaborators/universities from around the world working in the field of primary thermometry. The research to be performed in the InK project has two main thrusts: The development of primary thermometry methods that both challenge and supplant the defined scales at high (>1000 C) and low (<1 K) temperatures. This will enable, for the first time, and at these temperature extremes, to directly realise and disseminate thermodynamic temperature, with uncertainties that are competitive with the defined scales. Between these temperatures new values of T – T90 (by a variety of methods) with the lowest uncertainties (1 mK) will be determined. This is required for several reasons: a) in the short term to provide ultra-reliable T – T90 data for the MeP-K, b) to develop the primary thermometry techniques needed to progressively supplant defined scales and c) provide the background thermodynamic temperature data required for any successor temperature scale, namely ITS20XX. This presentation will give an overview of the project, initial results will be presented and its impact into world thermometry will be discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
