Test Beam Studies of The CMS ECAL Matrix Prototypes for HL-LHC

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Jofrehei, Arash | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51065 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Arfaei, Hessamaddin
Abstract:
To investigate many interesting and rare physics processes at the Large Hadron Collider, we need much more data. The High Luminosity LHC (HL-LHC) is a foreseen upgrade for LHC to increase its luminosity and get ten times more data until the end of HL-LHC.Without any intervention, The CMS ECAL will face many challenges in HL-LHC. The end-caps must be fully replaced, and the electronic structure of the barrels will be modified. This thesis addresses the R&D studies of both sections.For the barrels, a test beam experiment has been performed on a prototype 5x5 matrix of legacy PbWO4 crystals with the new Very Front End (VFE) boards and the data has been analyzed.For endcaps, a 3x5 martix of W-CeF3 sampling calorimeters has been studied in a test beam analysis. Moreover, a Geant4 optical photon simulation of the data is implemented. Using the data from test beam and the simulation output, an analysis was done to disentangle different physics phenomena which make up the final signal including spikes in the APD bulk, scintillation in the fibers, and scintillation in the CeF3 crystal
Keywords:
Compact Muon Solenoid (CMS)Test ; Scintillation ; Large Hadronic Collider ; Electromagnetic Calorimeter

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