Double-Trigger Calibration

Bit 9 is assigned from the double-trigger calibration. The double-trigger calibration is a special calibration procedure designed to reduce the event size of the Tracker at low inter-event time distances.This procedure consists essentially of an occupancy table calculation. This table is calculated using a particular pulsed trigger. This trigger is made from a long pulse then a couple of short pulses. Only the second event is then taken for the occupancy calculation.

Double-Trigger Calibration Procedure (Temporary)

The script for the double trigger calculation consist of this script JMDC script:

# stop calibration
0 0 TDR-D 53 1
# All TDR in Second-Step Calibration mode START
0 0 TDR-D 53 0 8008
# SecondStep Calibration Trigger ON DT
0 0 JLV1-P 53 0 0032 DeltaT _value
# wait 30 s
0 0 JMDC-SELF 5f0207 0 7530
# Calibration Trigger OFF
0 0 JLV1-P 53 1
# TDR Calibration STOP
0 0 TDR-D 53 1

If you want to make a reasonable double-trigger calibration you can use the follow command script from the ~/TrackerUser/JMDCCommander directory just after a normal calibration:

./Exec_CF CommandFileCollection/ResetSecondStepFlag.txt
./Exec_CF CommandFileCollection/SecondStep_135.txt
./Exec_CF CommandFileCollection/SecondStep_160.txt
./Exec_CF CommandFileCollection/ReadCalibration.txt

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Topic revision: r5 - 2010-09-10 - AlbertoOliva
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