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  • The μ-RWELL in High Energy ...
    Bencivenni, G.; de Oliveira, R.; De Lucia, E.; Felici, G.; Gatta, M.; Giovannetti, M.; Morello, G.; Poli Lener, M.

    Journal of instrumentation, 02/2024, Volume: 19, Issue: 2
    Journal Article

    Abstract The μ-RWELL, a resistive Micro-Pattern Gaseous Detector with a single amplification stage, is crafted using a copper-clad polyimide foil intricately micro-patterned with a blind hole (well) matrix. This matrix is integrated into the readout Printed Circuit Board, complemented by a thin Diamond-Like-Carbon sputtered resistive film, in order to mitigate the transition from streamer to spark regimes, enabling the attainment of substantial gains (≥10 4 ). However, this arrangement diminishes the detector's capacity to withstand high particle fluxes. For low-rate applications, the simplest resistive configuration utilises a single resistive layer with edge grounding. This design, however, exhibits a non-uniform response under elevated particle irradiation. To overcome this behaviour, new current evacuation geometries have been developed. In this work, we examine the efficacy of various high-rate resistive layouts, trialled at the prestigious CERN H8-SpS and PSI πM1 beam testing facilities. These designs are tailored to meet the demanding requisites of detectors operating in the HL-LHC environment, as well as those of future experiments at the next generation colliders, such as the FCC-ee/hh and CepC.