1. WG-3 summary CS scanning

2. People O.SatoNagoya Y.NonoyamaNagoya S.MiyamotoNagoya J.YoshidaNagoya T.FukudaNagoya T.NakanoNagoya S.AokiKobe Luigi Salvatore EspositoLNGS Giovanni DeLellisNapoli Artem ChukanovDubna Yury GornushkinDubna Cazes AntoineINFN Yves DeclaisLyon Carlo GustavinoLNGS Rosa Anna Fini Bari

3. Discussed Compton(beta ray) alignment TT display tools CS and ECC wrong association? CS feedback method request to Extract/ Development

4. Neutrino events 38 events 19 Euro : 19 NGY Not found cs : 3 + 2 High Fog(LNGS),3(NGY) Brick connect 11(Euro), 11(NGY) Vertex confirmed 8(Euro), 7(NGY )

5. Detection of position displacement peak of beta-ray -Take all combination of dx in ~+-100um - Angle allowance is FREE. 2.1um 1.8um

6. Application for the OPERA CSD Alignment accuracy is less than 1um. Effective to reject BG tracks very much. Samples : Cosmic run events ---- 26 CSDs Neutrino events ---- 32 CSDs

7. 40 um 20um in delta position space Plot vector as the center of peak in each unit area on the film map -> Relative Distortion map.

8. Continual area ratio of CSDs sucessful

9. The reason of below 90% Not enough beta-rays to align. ---- 1 Peak is detected, but double. ---- 5 Large Gap exists. ---- 1

10. Examples, Double Peak

11. Examples, Large Gap is Detected.

12. Summary Beta-ray alignment was applied to real OPERA Experiment. The number of beta-ray for alignment is enough. We estimated mechanical tightness. 26/32 CSDs is aligned successfully. 5/32 CSDs have Double Peaks, these are recoverable by detection both (We have 2 alignments, BG Doublet tracks become twice). 1/32 CSD has large (more than 100um) gap, we can detect it. We continue the study of these 6 events.

13. Standerd Doublet Selection:A Hold 4 /4 Position difference <20um (Xray alignment) Angle difference15mrad Pulse height Vol.>4 && 200< for All microtracks Reject noise near edge Reject noise near Xraymark

14. 178684089 36564 179264151 20122 180277945 33540 179351516 1429 181022331 5420 181543007 53486 182245114 40953 187381090 40742 182830967 34406 180560034 16918 191894066 51264 191894066 50855 191987837 34841 191894066 54963 182664156 17023 191843117 39031 187249556 16660 191843117 39030 182657820 41586 183483914 35556 183483914 31639 183483914 31638 181234835 34672 180560034 16969 180560034 14850 182657820 41613 180560034 16919 182657820 41641 187052315 38537 135 8 104 11 77 8 3 30 2 17 14 36 32 6 3 3 1110 2 5 327 6 22 0 0 1 6 2 1 174

15. 178684089 36564 179264151 20122 180277945 33540 179351516 1429 181022331 5420 181543007 53486 182245114 40953 187381090 40742 182830967 34406 180560034 16918 191894066 51264 191894066 50855 191987837 34841 191894066 54963 182664156 17023 191843117 39031 187249556 16660 191843117 39030 182657820 41586 183483914 35556 183483914 31639 183483914 31638 181234835 34672 180560034 16969 180560034 14850 182657820 41613 180560034 16919 182657820 41641 187052315 38537 Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found Track Found

16. Penetrating track32 straight track28 Curving Track4 Chance coincidence66

17. Xray alignment

18. Βray alignment

19. TT display tools

21. Alignment correction is important Brick position for display Mouse based track fitting helps for complicated events, NC etc.

22. CS and ECC wrong association?

23. Event 179312944, brick 11847

25. Proposal Change CS Xray mark pattern event by events

26. CS feedback method Request to extract/ development Easy to access DB based (user interface ? WEB) Working group(O.Sato,C.Bozza,L.Esposito) should start to realize this. BMM

27. END

28. Some Samples

31. At first, division of area (5mm x 5mm)

32. Estimation of successful area Continuity check is suitable which beta-ray alignment is success or not because distortion should be continual. -Check the difference of vector between adjacent area. -For example, d(dX)(a,b)=dX b -dX a - if d(dX) =2 adjacent areas, “a” is defined as continual(successful). b a c d e