The HARP TOF-WALL ELECTRONICS and TRIGGER LOGIC

In this note the HARP TOF-WALL electronic system is described. The TOF-WALL system adopted as a time digitizer the TDC CAEN V775, which was expressly designed and tested in collaboration with INFN TOF HARP groups. The measurements of TDC linearity, crosstalk and thermal drift, show a very good performance. Details of the behavior of re-designed discriminators and new-designed line receivers are also given. Finally, the TOF-WALL trigger logic is described, in particular the implementation of the local triggers foreseen specifically for the needs of the TOF-WALL