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

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

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

4. 4 Infinite DS-HCAL

5. 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. 6 Infinite OD (3cm iron)

7. 7 Infinite OD (5cm iron)

8. 8 Infinite OD (7cm iron)

9. 9 Infinite OD (10cm iron)

10. 10 Infinite OD (summary)

11. 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. 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. 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. 14 ID+Infinite OD Iron width: 3cm Iron width: 5cm

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

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

17. 17 Calibration without back-scattered particles 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 Two end point should be 1 With new calibration for DS-HCAL

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

19. 19 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 and to scale (ID+OD) 5cm OD

20. 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. 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