1. 1 The momentum measurement of 2ry particle emitted from neutrino interaction DONUT Meeting @FNAL DEC 10 th -11 th B.D.Park, S.Takahashi and T.Furukawa Nagoya univ. @ JAPAN

2. 2 Contents 1. Criterion of primary track & how many tracks picked up by the condition 2. The distribution of RMS for High-Energy tracks after Fine-Alignment 3. Scattering distribution 4. Momentum measured ratio as a function of the slope in each module 5. Measured momentum vs. Limit & Momentum measurement error 6. Measured momentum vs. Spectrometer data (μ) 7. Data summary

3. 3 Criterion of primary track and picked up the track 1. should start from vertex point or downstream plate of vertex point 2. consist of segments more than 3 segments (as track definition) 3. Impact parameter less than 5μm => Number of tracks / Number of events 634 / 168

4. 4 Number of tracks vs. IP IP < 5μm 192 tracks μm Number of track Large slope & a low PH

5. 5 RMS for High-Energy tracks after Fine-Alignment Entries 12013 RMS(x) 0.1198 RMS(y) 0.1233 Entries 3367 RMS(x) 0.0655 RMS(y) 0.0637 μm For all module For Module 1

6. 6 RMS for High-Energy tracks after Fine-Alignment Entries 1259 RMS(x) 0.1453 RMS(y) 0.1486 Entries 3134 RMS(x) 0.1010 RMS(y) 0.1093 μm For Module 2 For Module 3

7. 7 RMS for High-Energy tracks after Fine-Alignment Entries 857 RMS(x) 0.0941 RMS(y) 0.1082 Entries 499 RMS(x) 0.1128 RMS(y) 0.1041 μm For Module 4 For Module 5

8. 8 RMS for High-Energy tracks after Fine-Alignment Entries 2734 RMS(x) 0.1025 RMS(y) 0.1059 Entries 163 RMS(x) 0.0760 RMS(y) 0.0664 μm For Module 7 For Module 8

9. 9 Scattering distribution Bulk Entries 1049 ECC 200 Entries 985 ECC 800 Entries 495

10. 10 Momentum measured ratio as a function of the slope tan θ Number of track Probability Entries 491 measured track tried track tan θ

11. 11 Momentum measured ratio as a function of the slope Entries 75Entries 88 Entries 91 Entries 59

12. 12 Momentum measured ratio as a function of the slope Entries 30 Entries 130 Entries 18

13. 13 In each module Entries 69 Entries 66 Entries 48 Entries 26

14. 14 In each module Entries 19Entries 88 Entries 8

15. 15 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 290 (P < Limit)

16. 16 Momentum measurement error

17. 17 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 66 (P < Limit)

18. 18 Momentum measurement error

19. 19 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 34 (P < Limit)

20. 20 Momentum measurement error

21. 21 Measured momentum vs. Limit (Limit : maximum detectable momentum ) Entries 62 (P < Limit)

22. 22 Momentum measurement error

23. 23 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 25 (P < Limit)

24. 24 Momentum measurement error

25. 25 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 16 (P < Limit)

26. 26 Momentum measurement error

27. 27 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 83 (P < Limit)

28. 28 Momentum measurement error

29. 29 Measured momentum vs. Limit (Limit : maximum detectable momentum ) entries 4 (P < Limit)

30. 30 Momentum measurement error

31. 31 Measured momentum vs. Spectrometer (μ) 14 track

32. 32 Summary Ⅰ - 1 368 Number of Measured tracks 47 Too short tracks 90 Not enough plate ( below the plate#10) 3 No Track 2 No map file 124 Not good alignment (RMS for High-Energy tracks after Fine-Align less than 1μm)

33. 33 Summary Ⅰ - 2

34. 34 Summary Ⅱ