Latest revision as of 14:29, 29 May 2013

if((evt_TDC1190[107]-evt_TDC1190[106]>-600) && (evt_TDC1190[107]-evt_TDC1190[106])<-250 && abs(evt_TDC1190[104]-evt_TDC1190[106])<300)

Drift time

[math]t_{start}[/math] =event start time

[math] t_0[/math] =fixed time delay for the wire

[math]t_{TDC}[/math]=raw TDC time measurement (time is subtracted because TDCs are in common stop mode)

[math]t_{flight}[/math]=particles flight time from reaction vertex to the wire

[math]t_{prop}[/math] =signal propagation time along the wire

[math]t_{walk}[/math]=time-walk correction for short drift times due to different ionizations for slow and fast particles

@@ Line 1: / Line 1: @@
+;Discriminator threshold = 30 mV
+[[File:r4139_TDCtimeAllChan.png| 200 px]]
+[[File:r4139_WireTimeDiff.png| 200 px]]
+if((evt_TDC1190[107]-evt_TDC1190[106]>-600) && (evt_TDC1190[107]-evt_TDC1190[106])<-250 && abs(evt_TDC1190[104]-evt_TDC1190[106])<300)
+[[File:r4139_TDCtimeAllChanCuts.png| 200 px]]
+[[File:r4139_Occupancy.png| 200 px]]
+[[File:r4139_WireTimeDiffCuts.png| 200 px]]
+=Drift time=
+<math>t_{drift} = t_{start} - t_0 -t_{TDC}-t_{flight}-t_{prop} - t_{walk}</math>
+<math>t_{start}</math> =event start time
+<math> t_0</math> =fixed time delay for the wire
+<math>t_{TDC}</math>=raw TDC time measurement (time is subtracted because TDCs are in common stop mode)
+<math>t_{flight}</math>=particles flight time from reaction vertex to the wire
+<math>t_{prop}</math> =signal propagation time along the wire
+<math>t_{walk}</math>=time-walk correction for short drift times due to different ionizations for slow and fast particles
 [[CLAS12_R1_S1_QA#Runlist_Disc.3D30_mv]]