2018/07/01 by V. Izzo, Izzo, V., A. Aloisio +24
Physics and Astronomy · #FOS: Physical sciences #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.1807.00814
openalex publication_date 2018/07/01 · openalex created_date 2022/08/04 · openalex updated_date 2026/07/28
The Belle II experiment is presently in phase-2 operation at the SuperKEKB\nelectron-positron collider in KEK (Tsukuba, Japan). The detector is an upgrade\nof the Belle experiment at the KEKB collider and it is optimized for the study\nof rare B decays, being also sensitive to signals of New Physics beyond the\nStandard Model. The Electromagnetic Calorimeter (ECL) is based on CsI(Tl)\nscintillation crystals. It splits in a barrel and two annular end-cap regions,\nthese latter named Forward and Backward, according to the asymmetric design of\nthe collider. CsI(Tl) crystals deliver a high light output at an affordable\ncost, however their yield changes with temperature and can be permanently\ndamaged by humidity, due to the strong chemical affinity for moisture. Each ECL\nregion is then equipped with thermistors and humidity probes to monitor\nenvironmental data. While sensors and cabling have been inherited from the\noriginal Belle design, the ECL monitoring system has been fully redesigned. In\nthis paper, we present hardware and software architecture deployed for the 2112\nCsI(Tl) crystals arranged in the Forward and Backward end-caps. Single-Board\nComputers (SBCs) have been designed ad-hoc for embedded applications. For\nsensor read-out, a data-acquisition system based on 24-bit ADCs with local\nprocessing capability has been realized and interfaced with the SBCs. EPICS\napplications send data across the Local Area Network for remote control and\ndisplay.\n