Trigger Matrix

Shiuan-Hal

TriggerTrigger

(“times 4”)

μ

x

hodoscope

y

hodoscope

discriminator level shifter

level 1 v1495

level 2 v1495

triggersupervisor

TRIGGER

Compare with E866 trigger systemCompare with E866 trigger system

Replaced by v1495

TERMOR

TRIGS4XYAND134

E866 Trigger matrixE866 Trigger matrix Using the fast monte carlo simulation data.

And make cut which listed below. Only using station 1,2,4 hodoscope. Ignore all the track crossing X=0(The muon

was bended in Y-direction in E866) Restrict the positive muon go to upper side,

and negative muon go quite the other way in first station.

Confine the simulation muon come from the target and not from the dump.

E906 VS. E866 trigger systemE906 VS. E866 trigger system E866 Made up by CAMAC

and NIM logic modules

Common start 91ns from RF to

trigger output Look up table was

build in memory chip.

E906 Made up by VME

FPGA modules Common stop Maxium 300ns from

RF to trigger output Look up table was

build in FPGA

E906 Trigger system hardware E906 Trigger system hardware limit limit 128 input channels with 1 ns resolution and 128 ns

adjustable delay. The latency from input to output is about

(5x4=20)+?? ns. The latency will less then 150ns now for each v1495. Each pipeline step only cost 4ns now, and we have only 5 layers pipeline in our design. The “??” here means the latency from input to the trigger matrix pipeline which we are still not measure.

From a simple muon track simulation in bend plane, we found there are almost 1400 track conditions will appear for a positive muon. It means 2800 tracks need to deal in one v1495, and may cost about 9000 logic elements.

E906 Trigger matrix current E906 Trigger matrix current situationsituation In band plane v1495 Bit 1 on – if a triplet was a positive muon with a Ptxmax<0.6 GeV Bit 2 on – if a triplet was a positive muon with a Ptxmax<0.9 GeV

…….. Bit 8 on – if a triplet was a positive muon with a Ptxmax<2.7 GeV Bit 9 on – if a triplet was a negative muon with a Ptxmax<0.6 GeV Bit 10 on – if a triplet was a negative muon with a Ptxmax<0.9 GeV

…….. Bit16 on – if a triplet was a negative muon with a Ptxmax<2.7 GeV.

In non-band plane v1495 Still under discussion.

Maybe need to add the information of the number of fired paddle.

E906 Trigger matrix current E906 Trigger matrix current situationsituation Target Dimuon, good momentum

Dump Dimuon

Other Dimuon

Single target muon

Single non-target muon

At least one quadrant indicates track

3/4 planes hit in at least 2/4 front end FPGAs