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MINERvA Calorimetry Calibration with infinite detector

MINERvA Calorimetry Calibration with infinite detector. Jaewon Park University of Rochester. Jupiter/MINER v A Group Meeting, Nov 15, 2006. Infinite ID gap dependence. Angle: 0deg (perpendicular to detector) Gap difference gives ~1% contribution. Infinite DS-HCAL. No gaps

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MINERvA Calorimetry Calibration with infinite detector

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  1. MINERvA CalorimetryCalibration with infinite detector Jaewon Park University of Rochester Jupiter/MINERvA Group Meeting, Nov 15, 2006

  2. Infinite ID gap dependence • Angle: 0deg (perpendicular to detector) • Gap difference gives ~1% contribution

  3. Infinite DS-HCAL • No gaps • Proton beam energy: 1, 1.5, … 5GeV • Angle: 0, 10, … 60deg • 0deg means perpendicular to DS-HCAL

  4. Infinite DS-HCAL

  5. Infinite OD • With gaps • Iron width: 3, 5, 7, 10cm • Proton beam energy: 1, 1.5, … 5GeV • Angle: 30, 40, … 80deg • 90deg means perpendicular to OD

  6. Infinite OD (3cm iron)

  7. Infinite OD (5cm iron)

  8. Infinite OD (7cm iron)

  9. Infinite OD (10cm iron)

  10. Infinite OD (summary)

  11. Summary • Calibration constants are calculated for ID, DS-HCAL, 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)

  12. 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

  13. ID + infinite OD • With gaps in ID and OD • 4 types of ID+OD: iron width=3, 5, 7, 10cm • Proton beam energy: 1, 1.5, … 5GeV • Angle = 50deg • This is middle point of previous calibration(30 to 80deg) • ID track length: -100, -80, -40, 0, 40, 80, 100cm from center

  14. Iron width: 3cm Iron width: 5cm ID+Infinite OD

  15. Iron width: 10cm Iron width: 7cm ID+Infinite OD

  16. ID+Infinite OD (summary) • Calibration doesn’t work very well • ~5-10% lesser than beam energy

  17. Calibration without back-scattered particles Two end point should be 1 With new calibration for DS-HCAL • When ID track length=0, it should be 1 • Back-scattered particle can’t contribute DS-HCAL for composite detector • When ID track length is large, it’s ID only geometry

  18. Calibration without back-scattered particles With new calibration for OD • It doesn’t help very much for OD

  19. Next try 5cm OD • I don’t want change ID calibration • Relative OD calibration doesn’t help • It would be best to make flat in the central region and to scale (ID+OD)

  20. 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

  21. Summary • Individual calibration didn’t work very well for ID+OD. • It seems best to calibrating with combined detector which requires constant total energy over different ID track length. • Next step is leakage study

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