Figure 73 shows as an example the hadron PID
trigger. For each segment of the focal plane individual KAON, PION,
and PROTON triggers are formed. The logic .OR. of the
corresponding segments from each trigger is formed. The PION and
PROTON triggers are prescaled. Then the logic .OR. of the KAON
and prescaled PION and PROTON triggers forms the HKS TRIGGER. Signals
from each stage of the logic are send to scalers and low-resolution
TDCs for efficiency studies. Four versions with different gate width
of the HKS TRIGGER signal are send to scalers for determination of the
electronic deadtime.
The individual detector trigger and the electron trigger as well as more details about the electronics are given in an appendix to this document.