...
Cherenkovs in the trigger: To include the Cherenkov counters in the trigger push the C switch in the main trigger section in the coincidence unit. Check that the Cherenkov pulse amplitude, then set the discriminator threshold is set to TBD mVto a proper value to allow only high amplitude signals.
Trigger with Cherenkovs in veto: To set the trigger with the Cherenkov counters as veto, unselect the C switch from the main trigger section in the coincidence unit and plug the C1 and C2 unplugged cables (labeled C1 veto and C2 veto) from the discriminator into the second section from the top of the Logic fan-in fan-out (4th module from the left). The Cherenkov discriminator threshold must be set to TBD mVa proper value to cut high amplitude signals.
Trigger Configuration for pile-up study
This configuration allows to collectd collect in the same run a beam particle event ("true") followed by an junk a junk event ("fake").
Istructions to change from the standard configurations to the configuration to study pile-up
...
3. Plug the "Veto gate" cable into the "OR VETO" LOGIC FAN IN/OUT (2nd section 2 from the top with black label)
4. Set the Delay between the true and fake event to a proper value
5. Eventually set the Timer Unit Gate width to a proper value (the current value is 1 ms).This gate allows to collect a junk event without the next particle event.