The surface Resistive Plate Counter (sRPC) is a revolutionary RPC based on surface resistive electrodes realized with Diamond-Like-Carbon sputtered on Apical® foil. Exploiting high granularity ...current evacuation schemes developed for resistive MPGD and using electrodes with low surface resistivity (down to ∼100MΩ/□), sRPCs standing particle fluxes up to several hundreds kHz/cm2 should be easily developed. The scalability of the technology allows the construction of detectors for large area applications at future high luminosity colliders.
The state of art of μ-RWELL technology Bencivenni, G.; de Oliveira, R.; De Lucia, E. ...
Journal of instrumentation,
08/2023, Letnik:
18, Številka:
8
Journal Article
On the space resolution of the μ-RWELL Bencivenni, G.; Capoccia, C.; Cibinetto, G. ...
Journal of instrumentation,
08/2021, Letnik:
16, Številka:
8
Journal Article
The μ-RWELL is a new generation Micro-Pattern Gaseous Detector, composed of two elements: the cathode and the μ-RWELL_PCB including 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/cm2). More sophisticated schemes are under study for high-rate purposes (up to 2–3 MHz/cm2) in order to optimize the performance and the constructive process. For the phase-2 upgrade of the LHCb muon detector the experiment is targeting a luminosity of 2×1034 cm−2 s−1, with strong requirements on the robustness and detection efficiency of the muon system. We report on the ongoing R&D, showing also the latest measured performances of the new high-rate versions of the detector.
The micro-RWELL detector for the phase-2 upgrade of the LHCb muon system Bencivenni, G.; De Oliveira, R.; Felici, G. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
April 2023, 2023-04-00, Letnik:
1049
Journal Article
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The micro-RWELL detector (μ-RWELL) is a single amplification stage resistive Micro Pattern Gaseous Detector (MPGD), based on a copper-clad polyimide foil patterned with a micro-well matrix coupled ...with the readout PCB through a DLC resistive film (10÷100MΩ/□). For the phase-2 upgrade of the LHCb experiment, proposed for the LHC Run-5, the excellent performance of the current muon detector will need to be maintained at 40 times the pile-up level experienced during Run-2. Requirements are challenging for the innermost regions of the muon stations: the detectors should exhibit a rate capability up to 1MHz/cm2 and they are supposed to integrate a charge up to ∼1C/cm2. In this framework an intense optimization program of the micro-RWELL technology has been launched in the last year, together with a technology transfer to the industry operating in the PCB field. In order to fulfill the requirements, a new layout of the detector with a very dense current evacuation grid of the DLC has been designed. The detector, co-produced by the CERN-EP-DT-MPT Workshop, lead by one of the authors, and the ELTOS Company, has been characterized in terms of rate capability exploiting a high intensity X-ray Philips 2217/20 gun with a spot size (10÷50mm diameter) larger than the DLC grounding-pitch. A rate capability exceeding 10MHz/cm2 has been achieved, in agreement with previous results obtained with m.i.p. at the Paul Scherrer Institute (PSI) in Villigen (CH). A long term stability test is in progress: a charge of about 5mC/cm2 has been integrated over a period of about 16 days. The test will continue, in harder conditions (larger gain and X-ray flux), with the goal to integrate about 1C/cm2 in one year, while a slice test of the detector is under preparation.
In this work we present two innovative architectures of resistive MPGDs based on the WELL-amplification concept:
– the micro-Resistive WELL (μ-RWELL) is a compact spark-protected single ...amplification-stage Micro-Pattern Gas Detector (MPGD). The amplification stage, realized with a structure very similar to a GEM foil (called WELL), is embedded through a resistive layer in the readout board. A cathode electrode, defining the gas conversion/drift gap, completes the detector mechanics. The new architecture, showing an excellent space resolution, ~50μm, is a very compact device, robust against discharges and exhibiting a large gain (>104), simple to construct and easy for engineering and then suitable for large area tracking devices as well as digital calorimeters.
– the Fast Timing Micro-pattern (FTM): a new device with an architecture based on a stack of several coupled full-resistive layers where drift and multiplication stages (WELL type) alternate in the structure. The signals from each multiplication stage can be read out from any external readout boards through the capacitive couplings, providing a signal with a gain of 104–105. The main advantage of this new device is the improvement of the timing provided by the competition of the ionization processes in the different drift regions, which can be exploited for fast timing at the high luminosity accelerators (e.g. HL-LHC upgrade) as well as for applications like medical imaging.
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