Several detectors in the beamline allow to identify particles for the
Two plastic scintillation counters (beam paddle) up and down stream
of TRACER identify the beam. The downstream beam paddle forms in
coincidence with the TRACER scintillators (T1 and T2) the main trigger.
Electrons are identified by two Cerenkov counters (Cer1, Cer2)
and a shower counter. The latter, consisting of 3
scintillation counters (SC1, SC2, and SC3) and two layers of
Tungsten (2 radiation lengths per layer).
A scintillation counter behind a shielding concrete and iron beam stop
Two multi wire proportional chambers (TR1, TR2) have been used
in order to test new radiator material to develop new transition