Characterization of glass multigap RPC detector with alternative gas to SF
Résumé
Glass Multi-gap Resistive Plate Chamber detectors are primarily valued for their exceptional time resolution and are widely used in fields such as high-energy physics and tomography applications. Traditionally, these detectors are operated using Freon-based gas mixtures, primarily composed of CHF (R134a) and SF, both classified as greenhouse gases. This study investigates the development and performance of a novel 4-gaps glass MRPC prototype. A simplified construction method, using circular spacers instead fishing lines, ensures structural integrity while maintaining low production costs. The work focuses on identifying alternatives to SF, which is being phased out due to its high global warming potential and environmental impact. New EU regulations on fluorinated gases mandate restrictions on SF usage, including a complete ban in some applications by 2026, significantly impacting its cost and availability. Initial tests evaluate gas mixtures of R134a and iCH10 with fixed 5% iCH10 and SF concentrations ranging from 2% to 6%. NovecTM 4710 is also evaluated as a potential SF alternative with a significantly lower global warming potential (GWP). Preliminary results indicate that NovecTM 4710 demonstrates comparable efficiency curves while achieving a significant GWP reduction, paving the way for further investigations.