87,925 research outputs found
Recent R&D to improve the time resolution and rate capability of the Multigap Resistive Plate Chamber
No full textIn this study the results of tests performed at the T10 beam line at CERN on three novel MRPC detectors are reported. The tested detectors have different designs suited for different R&D goals: one detector has been built to improve the already excellent time resolution of the MRPC technology; the other two detectors have been designed and constructed to improve the MPRC rate capabilities. All the detectors are built maintaining the basic features of MRPCs: low price and ease of construction. The solutions adopted and described in this work for the time resolution improvement lead to a detection efficiency close to 100%, demonstrating the chamber functionality. To increase the MRPCs rate capabilities, a painted layer has been added to the surfaces of the MRPCs inner glass sheets. The measurements and tests performed showed that this solution can indeed increase the rate capability of the detector with respect to standard MRPC
Performance of the ALICE Time-Of-Flight detector at the LHC
No full textThe ALICE Time-Of-Flight (TOF) detector at LHC is based on the Multigap Resistive Plate Chambers (MRPCs). The TOF performance during LHC Run 2 is here reported. Particular attention is given to the improved time resolution reached by TOF detector of 56 ps, with the consequently improved particle identification capabilities.The ALICE Time-Of-Flight (TOF) detector at LHC is based on the Multigap Resistive Plate Chambers (MRPCs). The TOF performance during LHC Run 2 is here reported. Particular attention is given to the improved time resolution reached by TOF detector of ps, with the consequently improved particle identification capabilities
Light detection in DarkSide-20k
No full textThe Darkside experiment aims at the direct detection of WIMPs using a dual phase liquid Argon TPC . The next generation experiment, DarkSide-20k, will push the fiducial mass liquid argon to 20 tonnes. The light detection is a crucial part of the project; DS-20k will use, instead of the standard PhotoMultipliers (PMs), the Silicon PhotoMultipliers (SIPMs). This kind of photo-sensors will permit a higher photo-detection efficiency and a lower background, compared to standard PMs. The TPC will be outfitted with about 200,000 SiPMs grouped into 8200 single readout channels, 25 cm2 Photo Detection Module (PDM) . In this paper, the design and performance of the PDMs will be reported. The strategy to scale from the R&D to the DS-20k will be also discussed, together with recent results obtained from the first prototype Darkside-Proto-0 detector
The Epibloc System: Indication and Limits of this Method on the Treatment of Meta-Epiphyseal Fractures of Distal Radius
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[Conservative restorations in the posterior quadrant using amalgam: indications, instrumentation and operative method. I]
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