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O: Fachverband Oberflächenphysik

O 85: Vacuum Science & Technology: Theory and Applications II

O 85.1: Hauptvortrag

Donnerstag, 12. März 2026, 15:00–15:30, HSZ/0401

From light to pressure: Laser-based quantum technologies for the realization of high-precision pressure and vaccum standards — •Tom Rubin — Physikalisch-Technische Bundesanstalt (PTB), Berlin

The new realization of the pascal in the range between 1 Pa and 100 kPa is achieved by means of photonic pressure measurement. This not only enables significantly lower measurement uncertainties, but also more robust and faster-operating systems that can cover the entire pressure range continuously and for different gases. Gas-density-based methods open up new perspectives: from precise calibrations at the highest metrological level to non-invasive applications in vacuum technology and the development of innovative pressure sensors for the mass market.

This presentation is about key findings and highlights from the EU projects *QuantumPascal* and *MQB-Pascal*. These include overcoming major challenges, such as the need for sub-mK-level gas temperature knowledge, the advantages of the GAMOR (Gas Modulation Refractometry) method, and the latest results from validation and comparison measurements.

Keywords: QuantumPascal; Metrology; Photonic Pressure Measurement; Refractometry; Vacuum