1,721,303 research outputs found
Tracking with the CALICE Si-W electromagnetic calorimeter prototype using the Hough transform
No full textThe CALICE collaboration designs and tests highly granular calorimeters for
a prospective e+e− International Linear Collider. This note describes and characterises a robust tracking algorithm based on the Hough transform with which
the tracking capabilities of the finely granulated silicon-tungsten electromagnetic
calorimeter are addressed in an initial study
Status of the CALICE AHCAL Engineering prototype. Development of a high granular calorimeter for linear collider
No full textIn the CALICE Collaboration are developed calorimeters for a future e+e− Linear Collider. One approach is called Particle Flow which requireshighly granular calorimeters thus to achieve a jet energy resolution of 3-4%. The CALICE Collaboration is developing concepts and prototypes for Particle Flow optimized calorimeters with various readout technologies. The Analog Hadronic Calorimeter (AHCAL) is one of the concepts based on 3 × 3 cm2 scintillator tiles with Silicon Photomultipliers. The performance and suitability has been proven in the former physics prototype. The current focus of the second generation engineering prototype is on the full scalability of the detector.In 2014, two test beam periods happened at the PS at CERN, with an iron stack structure designed for the final detector (1 m3) and 15 active layers (including 3 ScECAL layers). This talk will focus on the engineering prototype commissioning phase before testbeam, the monitoring of the calorimeter during data taking and a first look into the data taken at the PS
Integration concepts for highly granular scintillator-based calorimeters
No full textThe Analog Hadron Calorimeter is an option for the hadronic calorimeter of a future linear collider detector, based on scintillator tiles read out by silicon photomultipliers. The high channel density compared to current collider detectors requires an integration of the readout electronics into the active detector layers. The electronics developed by the CALICE Collaboration is very flexible, and its use in the Analog Hadron Calorimeter engineering prototype as well as options for different silicon photomultipliers and different scintillator geometries are discussed
CALICE Report to the Calorimeter R&D Review Panel
No full textThe report describes the status of the calorimeter R&D for ILC detector performed in the CALICE collaboration. This status has been presented to the review panel at the LCWS07 workshop at DESY in June 2007
Hadron selection using Boosted Decision Trees in the semi-digital hadronic calorimeter
No full textThe CALICE Semi-digital Hadronic CALorimeter (SDHCAL) prototype using Glass Resistive Plate Chambers as a sensitive medium is the first technological prototype in a family of high-granularity calorimeters developed by the CALICE Collaboration to equip the experiments of future leptonic colliders. It was exposed to beams of hadrons, electrons and muons several times on the CERN PS and SPS beamlines in 2012, 2015 and 2016. We present here a new method of particle identification within the SDHCAL using the Boosted Decision Tree (BDT) method applied to the data collected in 2015. The performance of the method is tested first with GEANT4-based simulated events and then on the data collected in the SDHCAL in the energy range between 10 and 80GeV with 10GeV energy step. The BDT method is then used to reject the electrons and muons that contaminate the SPS hadron beams
The reconstruction of the energy lost by a 120 GeV muon in the highly granular hadron calorimeter for the International Linear Collider
No full textThe Calice collaboration developed a new design of a hadron calorimeter, featured by both a high
longitudinal granularity and a fine transverse segmentation. This property allows identifying and
reconstructing the interaction of single particles with the detector with an unprecedented spatial
resolution. The main topic of this note is the quantification of the systematic introduced by the
operation of the detector at the energy scale of a minimum ionizing particle. The muon signal
is the natural candidate for the observation of an improper behaviour of the detector, because
it is the smallest physical signal with well defined and predicted peak and width. Besides, the
reconstruction of the total energy lost by 120 GeV muons in the detector is shown, comparing the
Monte Carlo expectation with the data collected during the test beam of a prototype of the hadron
calorimeter
Beam Test Results with Highly Granular Hadron Calorimeters for the ILC
No full textTo evaluate different technologies for calorimetry at the International Linear Collider, the CALICE collaboration has constructed a highly granular analog hadron calorimeter with small scintillator cells, individually read out by silicon photomultipliers. This device has been extensively tested in particle beams. A digital hadron calorimeter based on RPC readout is currently under construction, with first prototype beam test results already available. The high granularity allows detailed investigations of the substructure of hadronic showers, and can also be exploited for the development of sophisticated reconstruction algorithms
SiPM-on-Tile Calorimetry for future Higgs factories and beyond
No full textThe CALICE collaboration develops highly granular calorimeters for future particle physics experiments. The Analogue Hadron Calorimeter (AHCAL), a sampling calorimeter using small plastic scintillator tiles directly read out by silicon photomultipliers (SiPMs) as active material, is a scalable concept for the hadronic calorimeter, providing good energy, spatial and time resolution at moderate cost.The CALICE collaboration has built a large AHCAL prototype consisting of 38 active layers in a steel absorber structure of ~4 interaction lengths. The readout electronics for the ~22000 readout channels are fully integrated in the active layers. The prototype has been tested in muon, electron and pion beams at DESY and CERN in 2018, and the analysis of the collected data is ongoing. To fully exploit the potential, beam tests with improved hit time resolution (~1 ns), with an alternative absorber structure made from tungsten, and a combined running with an ECAL prototype are foreseen.Further possible studies include alternative scintillator materials, scintillator geometries (mega-tiles instead of individual tiles wrapped in reflector foil) and SiPM types. Together with the silicon-tungsten ECAL developed within CALICE, we plan to work on a homogeneous readout system, taking into account the requirements of both technologies. This should also be able to accommodate timing layers with tens of ps hit time resolution. The testbeam programme and the further studies are open to new collaborators and to additional proposals.The SiPM-on-tile technology has already found an application in the upgrade of the calorimeter endcap of the CMS detector for HL-LHC. The experience gained there in terms of robustness for operation in harsh conditions and construction and commissioning of a large detector is expected to provide important input for further developments
Calorimetry for ILC Experiments: CALICE Collaboration R&D
No full textThe CALICE Collaboration is carrying out research and development into calorimetry for a detector at the International Linear Collider (ILC). CALICE is investigating a range of technologies for both electromagnetic and hadronic calorimetry. An overview of the prototypes and selected test-beam results are presented
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