Sciascia, B (reprint author), Ist Nazl Fis Nucl, Lab Nazl Frascati, Via Enrico Fermi, I-00044 Frascati, Italy.
Article; Proceedings Paper
A double-level trigger system has been developed for the KLOE experiment. Custom electronics asserts a trigger in a 2 mus decision time. The decision is based on the combined information of the electromagnetic calorimeter and the drift chamber. The entire trigger system is continuously monitored, and data flowing from the trigger system hal e allowed both an efficient online monitoring of the detector and an online luminosity measurement. (C) 2001 Elsevier Science B.V. All rights reserved.