Tagger trigger timing

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Below is tagger trigger timing information I got from Eugene Pasyuk. Note that cables are trimmed so the sum of all delays is the same for all T-counters

Delay
Location
25 ns
flight time tagger radiator to farthest T-counter
20 ns
in T-counter PMT
50 ns
cable to CFD
15 ns
internal CFD
5 ns
cable to L-R coincidence logic module
5 ns
internal L-R coincidence logic module
10 ns
cable to Master Or module
20 ns
internal MOR
80 ns
cable MOR to forward carriage
80 ns?
cable forward carriage to BCAL Trigger Supervisor (not installed yet)
45 ns
internal Trigger Supervisor
5 ns
TS to ADC crate
280 + 80 ns?
total delay


Note that the photon flight time from the radiator to the BCAL detector is about 100 ns, and that the RadPhi setup has 250 ns delay cables (straight, or 80+170 using a patch panel).