A visualization of the damage in Lead Tungstate calorimeter crystals after exposure to high-energy hadrons

• DOI: 10.1016/j.nima.2012.04.069
• Publication Date: 2012-05-05T03:02:58Z
• Authors: G. Dissertori; D. Luckey; F. Nessi-Tedaldi; F. Pauss; R. Wallny; R. Spikings; R. Van der Lelij; G. Arnau Izquierdo
• Keywords: info:eu-repo/classification/ddc/550; Physics - Instrumentation and Detectors; Improvement and equipment of irradiation and test beam lines [8]; FOS: Physical sciences; Instrumentation and Detectors (physics.ins-det); Qualification of components and common database [8.4]; High Energy Physics - Experiment; High Energy Physics - Experiment (hep-ex); 03 medical and health sciences; 0302 clinical medicine; ddc:550; Detectors and Experimental Techniques; 8.4: Qualification of components and common database; 8: Improvement and equipment of irradiation and test beam lines

The anticipated performance of calorimeter crystals in the environment expected after the planned High-Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN has to be well understood, before informed decisions can be made on the need for detector upgrades. Throughout the years of running at the HL-LHC, the detectors will be exposed to considerable fluences of fast hadrons, that have been shown to cause cumulative transparency losses in Lead Tungstate scintillating crystals. In this study, we present direct evidence of the main underlying damage mechanism. Results are shown from a test that yields a direct insight into the nature of the hadron-specific damage in Lead Tungstate calorimeter crystals exposed to 24 GeV/c protons.<br/>8 pages, 6 figures<br/>