Ip. Brawn et al., BEAM TESTS OF A PROTOTYPE LEVEL-1 CALORIMETER TRIGGER FOR LHC EXPERIMENTS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 349(2-3), 1994, pp. 356-366
Beam tests of a first-prototype electromagnetic calorimeter trigger pr
ocessor for LHC experiments are described. The synchronous, pipelined,
digital processor built with ASICs, was successfully operated at the
full LHC bunch-crossing frequency of 40 MHz. Real data signals were ob
tained from a liquid argon electromagnetic calorimeter. The measured p
erformance of the electron/photon trigger algorithm