Już 12 marca 2026 roku o godz. 12:30 w Audytorium Aleksandra Jabłońskiego prof. Graham Machin (National Physical Laboratory, Wielka Brytania) wygłosi wykład pt. "The kelvin redefinition and its impact on temperature traceability".
Streszczenie:
The talk will begin by giving the background to and briefly describe the decade long, multi-institute work that was performed to ensure a successful redefinition of the kelvin in May 2019.
Since the redefinition temperature traceability has been regulated by the “mise-en-pratique for the definition of the kelvin’ (MeP-K), which includes the current temperature scales (ITS-90 and PLTS-2000) but, crucially, also promotes the direct use of authorised primary thermometry methods as a means of providing traceability direct to the kelvin definition. A description of the MeP-K, and the way temperature traceability is, or could be, achieved in the future through the MeP-K, will be given. Currently the MeP-K is restricted to relatively traditional primary thermometry approaches, however there are emerging methods of low uncertainty thermometry (such as Doppler broadening thermometry, DBT) that could in the future be incorporated within the MeP-K to complement and support the currently authorised methods.
However, beyond the traditional approach to temperature traceability (linking to the national reference of temperature by an unbroken chain of measurements) there are a number of emerging practical primary thermometry approaches that could provide in-situ temperature traceability. The latter can take a number of approaches, both electron and photon based. These approaches will be described in this talk which will close with a discussion of the challenges and opportunities such approaches.
Organizatorem Kolokwium Czwartkowego jest Instytut Fizyki UMK w Toruniu.