2011/10/06 by G. Tinti, Tinti, Gemma
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #Radiation Detection and Scintillator Technologies
paper · pdf · doi:10.48550/arxiv.1110.1173
openalex publication_date 2011/10/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Hybrid silicon pixel detectors are currently used in the innermost tracking\nsystem of the Compact Muon Solenoid (CMS) experiment. Radiation tolerance up to\nfluences expected for a few years of running of the Large Hadron Collider (LHC)\nhas already been proved, although some degradation of the part of the silicon\ndetector closer to the interaction point is expected. During the LHC upgrade\nphases, the level of dose foreseen for the silicon pixel detector will be much\nhigher. To face this aspect, dedicated irradiation tests with fluences above\n\O(1015) n_ textrmeq/cm2 have been performed on the\nsilicon sensor and readout chip. Changes in the operation of the sensor and\nreadout chip as a function of the fluence are presented. The charge collection\nefficiency has been studied: partial recovery of the detector efficiency can be\nachieved by operating the detectors in a controlled environment and at higher\nbias voltage.\n