Calibration in energy

Calibration

The factors that are applied are coming from Jerome's results :
- Jerome's result's
Strips which are used to form the clusters of a modified ladder ( here it is the ladder 1)
Picture 1 : Adc of the N Sides strips of the ladder 1 before calibration
Picture 2 : Adc of the N Sides strips of the ladder 1 after calibration

Difference in pulse for the hits

Picture 1 : without calibration
Picture 2 : with calibration

Done on 80 events
only the 10 first ladders
except ladder 7 and 8

without calibration : < pulse N - pulse P > = -6 adc counts
with calibration : < pulse N - pulse P > = -2.3 adc counts

Case1-1(1-2)A(1-2)AS(1-3)A(1-3)AS(2-2)A(2-2)AP(2-2)B(2-3)A(2-3)AP(3-3)A
Case012345678910
With out calib3543198324458478502408649116
With calib3546188312518480522528149125
Diff+3-10-12+60+2+2+12-50+9

Ambiguous hits are for case > 6 .With the calibration , we hope to better reconstruct those hits .
From the table , it is not very significative

Clusters in hits

1) For one event : exemple :
file is : /star/data03/daq/2005/049/st_physics_6049030_raw_1010001.daq
stripCalib.root used : /star/data06/SSD/pedestal_calibration/run5/ToStoreInDb/ssdStripCalib.20050218.081219.root
Results from tle log ( one event to check)
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointSummary/Number of hits in the SSD
StSsdPointMaker::PrintPointSummary/Active Ladders 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
StSsdPointMaker::PrintPointSummary/Counts : 0 0 0 0 1 0 13 0 0 0 1 0 3 0 1 0 0 0 1 0
StSsdPointMaker::PrintPointSummary/Counts(11) : 0 0 0 0 1 0 2 0 0 0 1 0 1 0 1 0 0 0 1 0/

StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 7205
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 11 0 0
-->2 clusters : 1 on P side , 1 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 8207
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 5 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 13 0 79
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 100 13 0 80
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 2 100 13 0 81
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 3 100 12 2 165
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 4 100 12 2 166
-->7 clusters : 2 on P side , 5 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 8407
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 3 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 13 0 43
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 100 13 0 44
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 2 100 13 0 45
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 8507
-->4 clusters : 1 on P side , 3 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 5 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 11 0 9
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 100 11 2 42
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 2 100 13 1 32
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 3 100 13 1 33
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 4 100 13 1 34
-->8 clusters : 3 on P side , 5 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 8111
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 11 1 0
-->2 clusters : 1 on P side , 1 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 8613 StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 3 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 11 1 2
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 100 12 0 0
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 2 100 12 0 1
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 7114 <
-->5 clusters : 2 on P side , 3 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 8415
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 11 1 0
-->2 clusters : 1 on P side , 1 on N Side
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Wafer 7919
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 1 hit(s) in this wafer
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - Hit/Flag/NMatched/IdClusP/IdClusN
StSsdPointMaker:INFO - StSsdPointMaker::PrintPointDetails() - 0 100 11 0 0
-->2 clusters: 1 on P side , 1 on N Side
So finally we have :
Picture 1:Distribution of the P-clusters used in the hits
Picture 2:Distribution of the N-clusters of the hits

1) For 40 events ( more statistics):

Picture 1:Clusters Size
Picture 2:Clusters Size corriged of ladder 7and 8

Picture 3:SnRatio
Picture 3:SnRatio corriged of ladder 7and 8


To compare with the clusters that are reconstructed but all are not used to form the hits :
Picture 5:Clusters Size
Picture 6:Clusters Size corriged of ladder 7 and 8

Jonathan Bouchet
Last modified: 3 november