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Dataset for paper "Experimental characterization of RF-SQUIDs based Josephson Traveling Wave Parametric Amplifier exploiting Resonant Phase Matching scheme"
No full textA test bench for the assessment of flow meters accuracy for fuel consumption measurement in highly dynamic drive cycle tests
Full text linkRoadmap towards the redefinition of the second
Full text linkThis paper outlines the roadmap towards the redefinition of the second, which was recently updated by the CCTF Task Force created by the CCTF in 2020. The main achievements of optical frequency standards (OFS) call for reflection on the redefinition of the second, but open new challenges related to the performance of the OFS, their contribution to time scales and UTC, the possibility of their comparison, and the knowledge of the Earth's gravitational potential to ensure a robust and accurate capacity to realize a new definition at the level of 10-18 uncertainty. The mandatory criteria to be achieved before redefinition have been defined and their current fulfilment level is estimated showing the fields that still needed improvement. The possibility to base the redefinition on a single or on a set of transitions has also been evaluated. The roadmap indicates the steps to be followed in the next years to be ready for a sound and successful redefinition
Avogadro and Planck Constants, Two Pillars of the International System of Units
Full text linkThe International System of Units (SI), the current form of the metric system and the world's most used system of units, has been continuously updated and refined since the Metre Convention of 1875 to ensure that it remains up to date with the latest scientific and technological advances. The General Conference on Weights and Measures, at its 26th meeting in 2018, decided to adopt stipulated values of seven physical constants linked to seven measurement units (the second, meter, kilogram, ampere, kelvin, mole, and candela). This paper reviews the technologies developed, in intense and long-standing work, to determine the Avogadro and Planck constants, which are now integral to realising the kilogram
Air temperature sensors calibration in the Arctic, and its impact for climate measurements
No full textThe Arctic is an important place for environmental data due to its sensitivity to climate change and its remoteness. The research center of Ny-Ålesund, in the Norwegian Svalbard Archipelago, is a key place to perform such measurements given the infrastructures already available and the relative ease of access.
The harsh environment of the polar regions can degrade the performance of sensors, which are not designed to be run in these environments: maintenance of these sensors must be frequent and made with metrological rigour, in order to provide traceability and comparability in time and space with other sensors.
This communication reports on the calibration campaign INRiM set out on the air temperature sensors installed on the Ny-Ålesund Climate Change Tower (CCT), managed by CNR-ISP.
This campaign was able to correct the temperature measurements of the atmospheric vertical profile from ground to 34 m, and found errors up to 1 °C; moreover it was able to reduce the absolute measurement uncertainty with respect to the one stated by the manufacturer, and the relative uncertainty on the profile to few hundredths of a degree Celsius.
Future development will also be illustrated
Conferme Metrologiche di dicembre 2023 e di luglio 2024 del Sistema di misura dei Parametri “S” in connessione 3.5mm nel campo di frequenza da 9 kHz a 3 GHz
No full textIn questo rapporto tecnico si descrivono le operazioni di Conferma Metrologica del Sistema di misura dei Parametri “S” in connessione 3.5mm nel campo di frequenza da 9 kHz a 3 GHz effettuate nel dicembre 2023 e nel luglio 2024. Il risultato di queste operazioni è la determinazione dell’Indice di Compatibilità che, se ≤ 1 in valore assoluto, valida il sistema di misura INRIM.This technical report describes the operations of Metrological Confirmation for the "S” Parameters measurement system in 3.5mm connection, in the frequency range from 9 kHz to 3 GHz conducted during December 2023 and July 2024. The result of these operations is the determination of the Compatibility Index which, if ≤ 1 in absolute value, validates the INRIM measurement system
Experimental determination of effective light transport properties in fully anisotropic media
Full text linkStructurally anisotropic materials are ubiquitous in several application fields, yet their accurate optical characterization remains challenging due to the lack of general models linking their scattering coefficients to the macroscopic transport observables and the need to combine multiple measurements to retrieve their direction-dependent values. Here, we present an improved method for the experimental determination of light-transport tensor coefficients from the diffusive rates measured along all three directions, based on transient transmittance measurements and a generalized Monte Carlo model. We apply our method to the characterization of light-transport properties in two common anisotropic materials—polytetrafluoroethylene tape and paper—highlighting the magnitude of systematic deviations that are typically incurred when neglecting anisotropy
