MINERvA Calorimetry Calibration with infinite detector Jaewon Park University of Rochester...
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Transcript of MINERvA Calorimetry Calibration with infinite detector Jaewon Park University of Rochester...
MINERvA CalorimetryCalibration with infinite detector
Jaewon Park
University of Rochester
Jupiter/MINERvA Group Meeting, Nov 15, 2006
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Infinite ID gap dependence
Angle: 0deg (perpendicular to detector) Gap difference gives ~1% contribution
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Infinite DS-HCAL
No gapsProton beam energy: 1, 1.5, … 5GeVAngle: 0, 10, … 60deg
0deg means perpendicular to DS-HCAL
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Infinite OD
With gapsIron width: 3, 5, 7, 10cmProton beam energy: 1, 1.5, … 5GeVAngle: 30, 40, … 80deg
90deg means perpendicular to OD
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Summary Calibration constants are calculated for ID, DS-HCA
L, OD ID
Gap dependence Average over beam energy
DS-HCAL Average over beam energy and angle(0 to 50deg)
OD Iron width dependence Average over beam energy and angle(30 to 80deg)
Next step is to test those calibration constants with composite detectors (ID+DSHCAL and ID+OD)
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ID + infinite DS-HCAL
No gaps in ID and DS-HCAL Angle: 0deg (perpendicular to detector) Proton beam energy: 1, 1.5, … 5GeV ID track length: 476, 376, 276, 176, 76, 26cm
~2% deviation from beam energy
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ID + infinite OD
With gaps in ID and OD4 types of ID+OD: iron width=3, 5, 7, 10cmProton beam energy: 1, 1.5, … 5GeVAngle = 50deg
This is middle point of previous calibration(30 to 80deg)
ID track length: -100, -80, -40, 0, 40, 80, 100cm from center
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Calibration without back-scattered particles
When ID track length=0, it should be 1 Back-scattered particle can’t contribute DS-HCAL for composi
te detector
When ID track length is large, it’s ID only geometry
Two end point should be 1 With new calibration for DS-HCAL
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Calibration without back-scattered particles
It doesn’t help very much for OD
With new calibration for OD
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Next try
I don’t want change ID calibration Relative OD calibration doesn’t help It would be best to make flat in the central region a
nd to scale (ID+OD)
5cm OD
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Another try
First of all, I used different OD calibrations for 5, 7, 10cm OD to make close to 3cm OD curve
Then, scale (ID+OD) to make it near 1 Scale factor was 1.03 I hope to use same ID calibration for DS-HCAL and OD