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A new small-diameter Monitored Drift Tube (sMDT) chamber has been developed for the muon spectrometer of the ATLAS experiment to handle the higher collision rates expected at the CERN High Luminosity Large Hadron Collider (HL-LHC). This…

Instrumentation and Detectors · Physics 2021-12-08 Kevin Nelson , Yuxiang Guo , Dante Amidei , Edward Diehl

We present charged-particle distributions sensitive to the underlying event, measured by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13 TeV, in low-luminosity Large Hadron Collider fills corresponding to an…

High Energy Physics - Experiment · Physics 2017-05-11 ATLAS Collaboration

The CERN LHC provided proton and heavy ion collisions during its Run 2 operation period from 2015 to 2018. Proton-proton collisions reached a peak instantaneous luminosity of 2.1 $\times$ 10$^{34}$ cm$^{-2}$s$^{-1}$, twice the initial…

Instrumentation and Detectors · Physics 2024-11-26 CMS Collaboration

In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In…

Future LHC luminosity upgrades will significantly increase the amount of background hits from photons, neutrons and protons in the detectors of the ATLAS muon spectrometer. At the proposed LHC peak luminosity of 5*10^34 1/cm^2s, background…

CMS experiment is using Geant4 for Monte-Carlo simulation of the detector setup. Validation of physics processes describing hadronic showers is a major concern in view of getting a proper description of jets and missing energy for signal…

Instrumentation and Detectors · Physics 2018-08-09 Stefan Piperov

The LHC is undergoing a high luminosity upgrade, which is set to increase the instantaneous luminosity by at least a factor of five, resulting in a higher muon flux rate in the forward region, which will overwhelm the current trigger system…

Instrumentation and Detectors · Physics 2022-03-09 Stephen D. Butalla , Marcus Hohlmann

Recent measurements of radiation gamma background at high mountain altitude, namely at Basic Environmental Observatory Moussala (42{\deg}10' 45" N; 23{\deg} 35'07"E, 2925m a.s.l.) are carried out. The measurements are fulfilled with several…

Atmospheric and Oceanic Physics · Physics 2011-04-18 A. Mishev , E. Hristova

The Gaseous Electron Multiplier-based Time Projection Chamber (GEM-TPC) in TWIN configuration for particle tracking has been consolidated after extensive investigations in different facilities to study its tracking performance. The most…

The LHCb (Large Hadron Collider beauty) experiment at CERN aims at achieving a significantly higher luminosity than originally planned by means of two major upgrades: the Upgrade I that took place during the Long Shutdown 2 (LS2) and the…

The performance and strategies used in electron reconstruction and selection at CMS are presented based on data corresponding to an integrated luminosity of 19.7 inverse femtobarns, collected in proton-proton collisions at sqrt(s) = 8 TeV…

Instrumentation and Detectors · Physics 2015-07-02 CMS Collaboration

The two Zero Degree Calorimeters (ZDCs) of the CMS experiment are located at $\pm 140~$m from the collision point and detect neutral particles in the $|\eta| > 8.3$ pseudorapidity region. This paper presents a study on the performance of…

A new detector is being developed at the National Superconducting Cyclotron Laboratory (NSCL) to measure low energy charged-particles from beta-delayed particle emission. These low energy particles are very important for nuclear…

Instrumentation and Detectors · Physics 2016-06-27 D. Perez-Loureiro , C. Wrede

At the Large Hadron Collider at CERN the proton bunches cross at a rate of 40MHz. At the Compact Muon Solenoid experiment the original collision rate is reduced by a factor of O (1000) using a Level-1 hardware trigger. A subsequent factor…

High Energy Physics - Experiment · Physics 2008-11-26 The CMS Trigger , Data Acquisition Group

Advances in fabrication techniques and high-performance electronics have facilitated the development of fine-pitch Gas Electron Multipliers (GEMs). Earlier experimental and simulation findings suggest that these reduced-pitch GEMs can…

Instrumentation and Detectors · Physics 2026-01-16 Rajiv Gupta , Sunidhi Saxena , Ajay Kumar

Study of high energy cosmic events in the MeV range requires detector with high efficiency and energy resolution to be constructed. The present setup consisting of scintillator crystals CeBr3 with different thickness, each coupled with 12 x…

Instrumentation and Detectors · Physics 2025-12-10 Veronika Asova , Galin Bistrev , Simeon Ivanov

In this paper we present the R&D activity on a new GEM-based TPC prototype for AMADEUS, a new experimental proposal at the DA{\Phi}NE {\Phi}-factory at the Laboratori Nazionali di Frascati (INFN), aiming to perform measurements of the…

Instrumentation and Detectors · Physics 2013-04-24 M. Poli Lener , M. Bazzi , G. Corradi , C. Curceanu , A. D'Uffizi , C. Paglia , E. Sbardella , A. Scordo , D. Tagnani , A. Romero Vidal , J. Zmeskal

A low background germanium gamma ray spectrometer, GeTHU, has been installed at China JinPing underground Laboratory. The integral background count rate between 40 and 2700 keV was 0.6 cpm, and the origin was studied by Monte Carlo…

Instrumentation and Detectors · Physics 2014-03-10 Yuhao Mi , Hao Ma , Zhi Zeng , Jianping Cheng , Jian Su , Qian Yue

Results are reported from a search for new physics processes in events containing a single isolated high-transverse-momentum lepton (electron or muon), energetic jets, and large missing transverse momentum. The analysis is based on a 4.98…

High Energy Physics - Experiment · Physics 2013-05-14 The CMS Collaboration