The NA62 experiment at the CERN SPS will measure the branching ratio for the decay K+ → π+ vv̄ to within 10%. The large-angle veto (LAV) detectors must detect photons with energies as low as 200 MeV with an inefficiency of less than 104. After a comprehensive series of comparative studies, NA62 decided to base the LAV system on the lead-glass block/PMT assemblies recycled from the OPAL barrel calorimeter, and a prototype veto station, complete with front-end electronics, was constructed and tested in 2009. Eleven additional stations are to be constructed before data taking begins in 2012. We describe the design, construction, and testing of the LAV system, including the recovery and mechanical adaptation of the OPAL hardware, issues related to operation in high vacuum, HV distribution, and in-situ monitoring, and especially, the design of an efficient and economical system for the readout of time and energy over an extended dynamic range. © 2010 IEEE.
|Titolo:||The large-angle photon veto system for the NA62 experiment at CERN|
|Data di pubblicazione:||2010|
|Citazione:||The large-angle photon veto system for the NA62 experiment at CERN / Ambrosino, F.; Antonelli, A.; Costantini, F.; Di Filippo, D.; Fantechi, R.; Lamanna, G.; Leonardi, E.; Mannelli, I.; Massarotti, P.; Moulson, M.; Napolitano, M.; Palladino, V.; Raggi, M.; Saracino, G.; Spadaro, T.; Valente, P.; Venditti, S.. - (2010), pp. 852-855. ((Intervento presentato al convegno 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 tenutosi a Knoxville; United States nel 2010.|
|Appartiene alla tipologia:||04b Atto di convegno in volume|