S800 Documentation

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trigger [2013/12/11 16:25]
pereira [Begin sequence] 		trigger [2013/12/11 16:38]
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 +====== Trigger ======
 The main purpose of the trigger is to implement a coincidence between the S800 focal-plane fast timing scintillator [[Detectors#Plastic scintillators|E1]] and a secondary detector principally located at the target location. This coincidence is often a mandatory requirement when the trigger rate of the S800 alone (S800 singles) is too high for the data acquisition and the resulting dead time is prohibitive.  The main purpose of the trigger is to implement a coincidence between the S800 focal-plane fast timing scintillator [[Detectors#Plastic scintillators|E1]] and a secondary detector principally located at the target location. This coincidence is often a mandatory requirement when the trigger rate of the S800 alone (S800 singles) is too high for the data acquisition and the resulting dead time is prohibitive. 
  
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 In addition, scalers are connected to the raw and live trigger signals. For the determination of the dead time, both a free running and vetoed 10 kHz pulser signal are also connected to scalers. This is the preferred method because the pulser is not subject to possible double triggering effects like the raw trigger.  In addition, scalers are connected to the raw and live trigger signals. For the determination of the dead time, both a free running and vetoed 10 kHz pulser signal are also connected to scalers. This is the preferred method because the pulser is not subject to possible double triggering effects like the raw trigger. 
  
 +The list below is a direct copy of the scaler description file for the s800. This file maps channel names to channel numbers, and in addition determines the layout.
 +
 +^ Channel name ^ Channel number ^ Channel name ^ Channel number |
 +| Live.Trigger  ^ 10 | Raw.Trigger    ^ 9 |
 +| Live.Clock    ^ 12 | Raw.Clock      ^ 11 |
 +| S800.Source   ^ 0 | S800.Trigger   ^ 4 |
 +| Second.Source ^ 1 | Second.Trigger ^ 8 |
 +| Ext1.Source   ^ 2 | Ext1.Trigger   ^ 6 |
 +| Ext2.Source   ^ 3 | Ext2.Trigger   ^ 7 | 
 +| Coinc.Trigger ^ 5 |                ^  |
 +| E1.Up         ^ 16 | E1.Down        ^ 17 |
 +| E2.Up         ^ 18 | E2.Down        ^ 19 |
 +| CRDC1.Anode   ^ 22 | CRDC2.Anode    ^ 23 |
 +| TPPAC1        ^ 27 | TPPAC2         ^ 28 |
 +| OBJ.Scint     ^ 24 | XFP.Scint      ^ 25 |
 +| TAR.Scint     ^ 26 | XFP.Scint      ^ 25 |
 +| S800.Source   ^ 0 | OBJ.Si         ^ 26 |
 +| S800.Source   ^ 0 | OBJ.Scint      ^ 24 |
 +| S800.Source   ^ 0 | XFP.Scint      ^ 25 |
 +| Hodo.OR       ^ 30 |                ^  | 
  
  
trigger.txt ยท Last modified: 2023/10/24 16:47 by swartzj

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