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Pisa Meeting on Advanced Detectors / The micro-resistive-WELL detector for the phase 2 upgrade of the LHCb muon detector

The mu-RWELL is a new generation Micro-Pattern Gaseous Detector, composed of two elements: the cathode and the mu-RWELL PCB. The latter includes the amplification stage, realized with a polyimide structure micro-patterned with a blind-hole matrix, embedded through a Diamond-Like Carbon (DLC) resistive layer with the readout PCB. Different layouts of the resistive stage have been studied: the simplest one is based on a single DLC layer with edge grounding, suitable for low rate applications (30-40 kHz/cmˆ2). More sophisticated schemes are under study for high rate purposes (up to 2-3 MHz/ cmˆ2). The high-rate versions are still under intense R&D in order to optimize the performance and the constructive process, but this detector seems already a valid candidate to be used for the phase 2 upgrade of the LHCb muon detector. For this upgrade, the experiment is targeting a luminosity of 2x10ˆ34 cm-2s-1, with strong requirements on the robustness and detection efficiency of the muon system. We’ll report on the ongoing R&D, showing also the latest measured performances of the new high rate versions of the detector.

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