A. Cabrera
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View article: All Languages Matter: Evaluating LMMs on Culturally Diverse 100 Languages
All Languages Matter: Evaluating LMMs on Culturally Diverse 100 Languages Open
Existing Large Multimodal Models (LMMs) generally focus on only a few regions and languages. As LMMs continue to improve, it is increasingly important to ensure they understand cultural contexts, respect local sensitivities, and support lo…
View article: Upgrade of the CMS resistive plate chambers for the high luminosity LHC
Upgrade of the CMS resistive plate chambers for the high luminosity LHC Open
During the upcoming High Luminosity phase of the Large Hadron Collider (HL-LHC), the integrated luminosity of the accelerator will increase to 3000 fb −1 . The expected experimental conditions in that period in terms of background rates, e…
View article: Front-end electronics for CMS iRPC detectors
Front-end electronics for CMS iRPC detectors Open
A new generation of resistive plate chambers, capable of withstanding high particle fluxes (up to 2000 Hz · cm -2 ) and instrumented with precise timing readout electronics is proposed to equip two of the four high pseudorapidity stations …
View article: CMS RPC background — studies and measurements
CMS RPC background — studies and measurements Open
The expected radiation background in the CMS RPC system has been studied using the MC prediction with the CMS FLUKA simulation of the detector and the cavern. The MC geometry used in the analysis describes very accurately the present RPC s…
View article: Aging study on Resistive Plate Chambers of the CMS Muon Detector for HL-LHC
Aging study on Resistive Plate Chambers of the CMS Muon Detector for HL-LHC Open
In the High Luminosity Large Hadron Collider (HL-LHC) program, during the next years, the instantaneous luminosity will increase up to 5 x 10(34) cm(-2) s(-1) which means a factor five higher than the nominal LHC luminosity. In that period…
View article: CMS RPC activities during LHC LS-2
CMS RPC activities during LHC LS-2 Open
The second LHC long shutdown period (LS2) is an important opportunity for the CMS Resistive Plate Chambers (RPC) to complete their consolidation and upgrade projects. The consolidation includes detector maintenance for gas tightness, HV (h…
View article: A new approach for CMS RPC current monitoring using Machine Learning techniques
A new approach for CMS RPC current monitoring using Machine Learning techniques Open
The CMS experiment has 1054 RPCs in its muon system. Monitoring their currents is the first essential step towards maintaining the stability of the CMS RPC detector performance. The current depends on several parameters such as applied vol…
View article: RPC system in the CMS Level-1 Muon Trigger
RPC system in the CMS Level-1 Muon Trigger Open
The CMS experiment implements a two-level triggering system composed of Level-1, instrumented by custom-design hardware boards, and a software High Level Trigger. To cope with the more challenging luminosity conditions, a new Level-1 archi…
View article: Effects of the electronic threshold on the performance of the RPC system of the CMS experiment
Effects of the electronic threshold on the performance of the RPC system of the CMS experiment Open
Resistive Plate Chambers have a very important role for muon triggering both in the barrel and in the endcap regions of the CMS experiment at the Large Hadron Collider (LHC) . In order to optimize their performance, it is of primary import…
View article: Search for Heavy Stable Charged Particles in the CMS Experiment using the RPC Phase II upgraded detectors
Search for Heavy Stable Charged Particles in the CMS Experiment using the RPC Phase II upgraded detectors Open
Several theoretical models inspired by the idea of supersymmetry (SUSY) accommodate the possibility of Heavy Stable Charged Particles (HSCPs). The Phase II upgrade of the CMS-RPC system will allow the trigger and identification of this kin…
View article: R&D of a real-size mosaic MRPC within the framework of the CMS muon upgrade
R&D of a real-size mosaic MRPC within the framework of the CMS muon upgrade Open
Based on previous experience and attempt, a real-size mosaic Multi-gap Resistive Plate Chamber (MRPC) has been developed within the framework of the CMS muon upgrade efforts. The chamber is a 5-gap with plates made each of 6 pieces of low …
View article: RPC radiation background simulations for the high luminosity phase in the CMS experiment
RPC radiation background simulations for the high luminosity phase in the CMS experiment Open
The high luminosity expected from the HL-LHC will be a challenge for the CMS detector. The increased rate of particles coming from the collisions and the radioactivity induced in the detector material could cause significant damage and res…
View article: High voltage calibration method for the CMS RPC detector
High voltage calibration method for the CMS RPC detector Open
The Resistive Plate Chambers (RPC) are used for muon triggers in the CMS experiment. To calibrate the high voltage working-points (WP) and identify degraded detectors due to radiation or chemical damage, a high voltage scan has been perfor…
View article: Longevity studies on the CMS-RPC system
Longevity studies on the CMS-RPC system Open
In the next decades, the Large Hadron Collider (LHC) will run at very high luminosity (HL-LHC) 5 x 10(34) cm(-2) s(-1), factor five more than the nominal LHC luminosity. During this period the CMS RPC system will be subjected to high backg…
View article: Long-term performance and longevity studies of the CMS Resistive Plate Chambers
Long-term performance and longevity studies of the CMS Resistive Plate Chambers Open
Four double-gap CMS resistive plate chambers are being tested at the CERN Gamma Irradiation Facility to determine the performance and aging effects at the expected conditions of the High Luminosity-Large Hadron Collider. Results up to an i…
View article: R&D towards the CMS RPC Phase-2 upgrade
R&D towards the CMS RPC Phase-2 upgrade Open
High pseudo-rapidity region of CMS muon system is covered only by Cathode Strip Chambers (CSC) and lacks redundant coverage despite the fact that it is a challenging region for muons in terms of backgrounds and momentum resolution. In orde…
View article: Radiation tests of real-sized prototype RPCs for the Phase-2 Upgrade of the CMS Muon System
Radiation tests of real-sized prototype RPCs for the Phase-2 Upgrade of the CMS Muon System Open
We report on a systematic study of double-gap and four-gap phenolic resistive plate chambers (RPCs) for the Phase-2 upgrade of the CMS muon system at high eta. In the present study, we constructed real-sized double-gap and four-gap RPCs wi…
View article: Radiation background with the CMS RPCs at the LHC
Radiation background with the CMS RPCs at the LHC Open
The Resistive Plate Chambers (RPCs) are employed in the CMS Experiment at the LHC as dedicated trigger system both in the barrel and in the endcap. This article presents results of the radiation background measurements performed with the 2…