Trigger timing has been checked to fix the high dead time: the CRAMS DATAREADY stay high much longer than expected (several ms instead of few tens of us) when T1 is present.
The problem is related to the fact that T3 open the T/H of the Gassiplex cards, then L1A request the readout of the gassiplex indetendently from the presence of a T3. This seems to confuse the CRAMS.
To prevent that, we modified the logic so that now the absence of T/H inhibits L1A and therefore the cards are not read out.
The DATAREADY now stay high the expected time and the dead time is ax expected: 100% at something more that 2 kHz.
The timing diagram of the RICH trigger is attached.
TODO/Experts (with beam, in counting house): - verify missing strips - HV scan (2100-2300) - delay scan (of the T/H respect to T3) - threshold scan (from 1. to 4. sigma of noise)
Timing diagram of the RICH trigger-
timing_nov10.pdf