The scintillators
Surviving the early stage of the experiment a set of 13 scintillators covering a limited surface of 340 by 340 m2 allows to unambiguously detect high energy cosmic ray events.
A CODALEMA scintillator in it plastic box on the field.
It provides a particle trigger sent to a dedicated GPS station for accurate time recording and off-line time coincidence with the autonomous stations. It requires that 5 scintillators out of 13 see a signal above 15 mV corresponding to a detection energy threshold of the order of 1015 eV (considering the array extension). This trigger is also used to record signals from dedicated cabled antenna arrays and to provide software triggers sent over the network to distant antennas.
