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Adinolfi, M; Ambrosino, F; Antonelli, M; Bini, C; Bocci, V; Bossi, F; Branchini, P; Cabibbo, G; Caloi, R; Casarsa, M; Cataldi, G; Ciambrone, P; De Lucia, E; De Robertis, G; De Simone, P; Dell’ Agnello, S; Denig, A; Di Domenico, A; Di Donato, C; Di Falco, S; Doria, A; Felici, G; Ferrari, A; Finocchiaro, G; Forti, C; Franzini, P; Gatti, C; Gauzzi, P; Gero, E; Giovannella, S; Graziani, E; Guarnaccia, P; Incagli, M; Kuo, C; Lanfranchi, G; Martemianov, M; Mei, W; Messi, R; Moulson, M; Müller, S; Murtas, F; Pacciani, L; Palutan, M; Pasqualucci, E; Passalacqua, L; Passeri, A; Patera, V; Picca, D; Pirozzi, G; Pontecorvo, L; Primavera, M; Ruggieri, F; Santangelo, P; Santovetti, E; Saracino, G; Schwick, C; Sciascia, B; Sciubba, A; Sfiligoi, I; Spadaro, T; Spiriti, E; Valente, P; Valeriani, B; Venanzoni, G; Ventura, A
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 10/2002, Volume: 492, Issue: 1Journal Article
We present the design of the trigger system for the KLOE experiment at the Frascati φ-factory DAΦNE. The detector consists of a large-volume drift chamber and a calorimeter both immersed in a 0.52 T solenoidal field. The trigger, structured with a first- and a second-decision level, is based on the multiplicity of energy deposits in the calorimeter and of hits in the drift chamber. The selection criteria are described and the efficiency for detecting φ decays is evaluated using data.
