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WG-3 summary CS scanning

WG-3 summary CS scanning. People. O.Sato Nagoya Y.Nonoyama Nagoya S.Miyamoto Nagoya J.Yoshida Nagoya T.Fukuda Nagoya T.Nakano Nagoya S.Aoki Kobe Luigi Salvatore Esposito LNGS Giovanni DeLellis Napoli Artem Chukanov Dubna Yury Gornushkin Dubna

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WG-3 summary CS scanning

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  1. WG-3 summaryCS scanning

  2. People • O.Sato Nagoya • Y.Nonoyama Nagoya • S.Miyamoto Nagoya • J.Yoshida Nagoya • T.Fukuda Nagoya • T.Nakano Nagoya • S.Aoki Kobe • Luigi Salvatore Esposito LNGS • Giovanni DeLellis Napoli • Artem Chukanov Dubna • Yury Gornushkin Dubna • Cazes Antoine INFN • Yves Declais Lyon • Carlo Gustavino LNGS • 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 ofposition 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. Plot vector as the center of peak in each unit area on the film map -> Relative Distortion map. 40 um 20um in delta position space

  8. Continual area ratio of CSDs sucessful 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 difference 15mrad Pulse height Vol. >4 && 200< for All microtracks Reject noise near edge Reject noise near Xraymark

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

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

  16. Penetrating track 32 straight track 28 Curving Track 4 Chance coincidence 66

  17. Xray alignment

  18. Βray alignment

  19. TT display tools

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

  21. CS and ECC wrong association?

  22. Event 179312944, brick 11847

  23. Proposal • Change CS Xray mark pattern event by events

  24. 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

  25. END

  26. Some Samples

  27. Some Samples

  28. Some Samples

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

  30. 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)=dXb-dXa • - if d(dX) < 10umfor >=2 adjacent areas, “a” is defined as continual(successful). b c e a d

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