1,939 research outputs found
Improved Resistive Plate Chambers for the upgrade of the CMS muon detector
No full textSeveral upgrades of the Resistive Plate Chamber (RPC) system of the Compact Muon Solenoid (CMS) experiment are currently being implemented to ensure a highly performing muon system during the upcoming High Luminosity phase of the Large Hadron Collider which will have an increased integrated luminosity of 3000 fb. The expected experimental conditions in that period present a challenge for the entire CMS detection system. To extend the RPC coverage, an improved version of the already existing RPCs will be installed in the forward region of the 3rd and 4th endcap disks. The current overall status of this CMS RPC upgrade project is presented
The Simulations Chain of the MURAVES Experiment
No full textThe MUon RAdiography of VESuvius (MURAVES) project is aimed at studying the summital cone of Mt.
Vesuvius, an active and hazardous volcano near Naples, Italy. A detailed Monte Carlo simulation framework is necessary in order to investigate the effects of the experimental constraints and to perform comparisons with the actual observations. Our Monte Carlo setup combines a variety of Monte Carlo programs
that address different aspects of cosmic muon simulation, from muon generation in the Earth’s upper atmosphere to the response of the detector, including the interactions with the material of the volcano. We
will elaborate on the rationale for our technical choices, including the trade-off between speed and accuracy, and on the lessons learned, which are of general interest for similar use cases in muon radiograph
End-to-end simulations of the MUon RAdiography of VESuvius experiment
No full texthe MUon RAdiography of VESuvius (MURAVES) project aims at the study of the
summital cone of Mt. Vesuvius, an active volcano near Naples (Italy), by measuring its density
profile through muon flux attenuation. Its data, combined with those from gravimetric and seismic
measurement campaigns, will be used for better defining the volcanic plug at the bottom of the
crater. We report on the development of an end-to-end simulation framework, in order to perform
accurate investigations of the effects of the experimental constraints and to compare simulations,
under various model hypotheses, with the actual observations. The detector simulation setup is
developed using GEANT4 and a study of cosmic particle generators has been conducted to identify
the most suitable one for our simulation framework. To mimic the real data, GEANT4 raw hits
are converted to clusters through a simulated digitization: energy deposits are first summed per
scintillator bar, and then converted to number of photoelectrons with a data-driven procedure.
This is followed by the same clustering algorithm and same tracking code as in real data. We
also report on the study of muon transport through rock using PUMAS and GEANT4. In this
paper we elaborate on the rationale for our technical choices, including trade-off between speed
and accuracy. The developments reported here are of general interest in muon radiography and
can be applied in similar cases.PublishedC010152V. Struttura e sistema di alimentazione dei vulcaniJCR Journa
Author Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery
No full textIn the version of this article initially published, CMS Collaboration author names, affiliations and acknowledgements were omitted and have now been included in the HTML and PDF versions of the articl
Muon Detector Development for the CMS Phase-2 Upgrade and Muon Radiography Applications
No full textThis work contributed to the advancement of muon detector technology for the CERN Compact Muon Solenoid (CMS) experiment and explored broader applica- tions of muon detectors in interdisciplinary research. The CMS experiment at the Large Hadron Collider (LHC) is undergoing crucial upgrades in preparation for the upcoming high-luminosity phase of the accelerator. The research presented in this thesis includes the design and construction of new Resistive Plate Chambers (RPCs) to enhance the CMS muon system. To address the concerns related to the high global warming potential of the gas mixtures that are currently used in RPCs, alternative, eco-friendly mixtures were explored. Additionally, investigations were undertaken to study muon detectors for interdisciplinary applications, particularly for muon ra- diography—a technique utilising cosmic-ray muons to study the internal structures of large-scale objects. As part of a project to develop a light-weight, portable muon radiography telescope, small-size glass-RPCs were designed. Further insights into this imaging technique were gained through participation in the MURAVES project, where scintillator-based muon telescopes are used to study the internal structure of the active Mt. Vesuvius volcano near Naples, Italy
CMS Inner Tracker Module Production and Qualification for the HL-LHC Upgrade
No full textThe High-Luminosity Large Hadron Collider (HL-LHC) operation will push the CMS experiment to its limits with a peak instantaneous luminosity of . This demanding environment will expose the CMS Inner Tracker (IT) pixel detector to unprecedented radiation levels and extreme hit rates. To withstand these conditions and manage the high pileup expected during operation, the new IT system features an optimized layout with thin silicon sensors, small pixel sizes, and fast, radiation-hard electronics based on advanced CMOS technology developed by the RD53 collaboration. Currently, pre-production modules are under construction, and extensive testing is ongoing to validate both the detector components and the associated quality control procedures. In the coming months, full-scale production of IT modules will
begin. This contribution provides an overview of the IT upgrade and summarizes the status of module production at the assembly sites, highlighting the results from testing and qualification
Improved Resistive Plate Chambers for Phase 2 upgrade of CMS
No full textIn view of the High Luminosity LHC, the CMS Muon system will be upgraded to sustain its efficient muon triggering and reconstruction performance. Resistive Plate Chambers (RPC) serve as dedicated detectors for muon triggering due to their excellent timing resolution. The RPC system will be extended up to 2.4 in pseudorapidity. Before the LHC Long Shutdown 3, new RE3/1 and RE4/1 stations of the forward Muon system will be equipped with improved Resistive Plate Chambers (iRPC) having, compared to the present RPC system, a different design and geometry and 2D strip readout. This advanced iRPC geometry configuration allows to improve the rate capability and hence to survive the harsh background conditions during the HL-LHC phase. Several iRPC demonstrator chambers were installed in CMS during the recently completed 2nd Long Shutdown to study the detector behavior under real LHC conditions. This paper summarizes the iRPC project and its schedule, including the status of the iRPC production sites, details of the chamber quality control procedures and results of the commissioning of the demonstrator chambers
Improved Resistive Plate Chambers for Phase 2 upgrade of CMS
No full textIn view of the High Luminosity LHC, the CMS Muon system will be upgraded to sustain its efficient muon triggering and reconstruction performance. Resistive Plate Chambers (RPC) serve as dedicated detectors for muon triggering due to their excellent timing resolution. The RPC system will be extended up to 2.4 in pseudorapidity. Before the LHC Long Shutdown 3, new RE3/1 and RE4/1 stations of the forward Muon system will be equipped with improved Resistive Plate Chambers (iRPC) having, compared to the present RPC system, a different design and geometry and 2D strip readout. This advanced iRPC geometry configuration allows to improve the rate capability and hence to survive the harsh background conditions during the HL-LHC phase. Several iRPC demonstrator chambers were installed in CMS during the recently completed 2nd Long Shutdown to study the detector behavior under real LHC conditions. This paper summarizes the iRPC project and its schedule, including the status of the iRPC production sites, details of the chamber quality control procedures and results of the commissioning of the demonstrator chambers
Eco-friendly resistive plate chamber detectors for HEP applications
No full textResistive Plate Chamber detectors are largely employed in current High Energy Physics experiments, thanks to their relatively low cost and good spatial/time resolution. They are typically operated in avalanche mode with large fractions of Tetrafluoroethane (C2H2F4), a gas recently banned by the European Union due to its high Global Warming Potential (GWP). An intense R&D activity is ongoing to improve RPC technology in view of present and future High Energy Particle Physics (HEP) applications. Since a few years, a joint effort among the ALICE, ATLAS, CMS, LHCb/SHiP and CERN Detector Technology (EP-DT) Communities is in place to search for potential eco-friendly gas mixtures and assess the performance of RPCs under different irradiation conditions. Tests are in progress at the CERN Gamma Irradiation Facility (GIF++). In this paper, a review on the promising results of these studies and future plans will be given
- …
