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The Status of the OPERA experiment II

The Status of the OPERA experiment II. 2006.10.31. Toshiyuki Nakano. Top　View. 7m. 4 m. Side　View. Target Tracker signals of Rock muon (2006/08/18 05:25:46 GMT). 174969( NGY). Changeable Sheet. Interface plate TT　to Brick(ECC) Brick Tagging specially for NC-like event. CS Doublet.

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The Status of the OPERA experiment II

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  1. The Status of the OPERA experiment II 2006.10.31 Toshiyuki Nakano

  2. Top　View 7m 4m Side　View Target Tracker signals of Rock muon (2006/08/18 05:25:46 GMT) 174969(NGY)

  3. Changeable Sheet • Interface plate TT　to Brick(ECC) • Brick Tagging specially for NC-like event. CS Doublet ~10cm BRICK: ECC Sub-mm res. T.T. 2.6cm pitch • Must be low back ground -> Doublet, Refreshed in GS • Must be high efficiency • Very huge Scanning load -> 1300cm2/day

  4. Exposure : August 17 to 30 (4.5days ×2) 7.6 x 1017 POT Total 20×15 CSD have been installed.

  5. Position of CS in whole TT surface top Detector front view ~1/10 of Detector cross section Rock side Corridor side bottom mm

  6. Top　View 7m OPERA films 300 set of CSD 4m Side　View Target Tracker signals of Rock muon (2006/08/18 05:25:46 GMT) 174969(NGY)

  7. 174969(NGY) Arrived on Sep. 4th in Japan. Started scanning immediately.

  8. 174969(NGY) 11.5x6cm2

  9. Automatic Emulsion Scanning System “S-UTS”

  10. 174969 2-20-1-1 87,120,627 Micro Track

  11. q1 q2 Dr qcs1 q3 qcs2 q4 Fourfold coincidence CS Doublet cross section • Reconstruction Conditions : • D(qcs1-q1,2) < 0.070 rad • D(qcs2-q3,4) < 0.070 rad • D(qcs1-qcs2) < 0.010 rad • D(rcs1-rcs2)<10 mm Emulsion 45mm BASE 200mm BASE Emul Emul

  12. EV174969 • Scanning result (11.5 x 6.0 cm2) • CS 2-20-1-1 87,120,627 Micro Track • CS 2-20-1-2 123,520,647 Micro Track • CS 2-20-2-1 79,743,432 Micro Track • CS 2-20-2-2 116,934,974 Micro Track • 8 tracks were reconstructed: dq,dr < 10mrad,10mm (qCS1-qCS2) • By applyingTT selection, • dqX<50mrad & dqY < 50mrad • Remained 1 candidate track out of 8 • Confirmed by Eye Scan.

  13. Eye Scan Result Event 174969 scanned by Eyes B+B+C+C B+B+C+F C+F+C+C F+F+C+F C+F+F+C C+F+F+C F+C+C+F T+T+T+T • Fake candidate by Automatic, • but EASY to distinguish by eyes • B: Black track (heavy) • C: Compton (very low momentum) • F: Fog (Random coincidence grains) • T: True track (Real Track)

  14. EV174969 • Found Track parameters • X=-250.8090cm , Y=-254.6873cm • tan(qX) = -0.1335, tan(qY)= 0.0520 • PH = 42.0133(22.0083+20.0050) • tan(dqX)(1-2) = -2.1mrad, tan(dqY)(1-2) = -1.2mrad • dX(1-2) = 6.7mm, dY(1-2) = -0.3mm • (1-2) means CS pl1 to pl2 difference • Comparison to the TT prediction • dX = -1.81cm, dY = -0.59cm (Em Track - TT pred.) • dqX = 0.5mrad, dqY = 35.0mrad

  15. 2006/08/27 07:48:42(GMT) Top　View 7m 4m Side　View 9516652(NGY)

  16. 9516652(NGY)

  17. 9516652(NGY) 8x6cm2

  18. 9516652 8-03-1-2 53,649,555 Micro Track

  19. EV9516652 • Scanning result (8.0 x 6.0 cm2) • CS 8-03-1-1 34,708,814 Micro Track • CS 8-03-1-2 53,649,555 Micro Track • CS 8-03-2-1 30,699,617 Micro Track • CS 8-03-2-2 43,407,695 Micro Track • 3 tracks were reconstructed: dq,dr < 10mrad,10mm (qCS1-qCS2) • By applying TT selection • dqX<50mrad & dqY < 50mrad • Remained 1candidate track out of 3 • Confirmed by Eye Scan

  20. Eye Scan Result Event 9516652 F+F+B+B C+F+C+C T+T+T+T • B: Black track (heavy) • C: Compton (very low momentum) • F: Fog (Random coincidence grains) • T: True track

  21. EV9516652 • Found Track parameters • X= -27.3543cm , Y=-190.3530cm • tan(qX) = 0.0137, tan(qY) = 0.1076 • PH = 45.0179(23.0097+22.0082) • tan(dqX)(1-2) = 4.0mrad, tan(dqX)(1-2) = 2.7mrad • dX(1-2) = -7.9mm, dY(1-2) = 9.3mm (X-ray alignment) • (1-2) means CS pl1 to pl2 difference • Comparison to the TT prediction • dX = -1.55cm, dY = -0.55cm (Em Track - TT pred.) • dqX = -9.3mrad, dqY = 6.6mrad

  22. All tried predictions on CSD Found 4 out of 7 predictions ⇒ Should be checked efficiency

  23. CSD background component in full scanned angular space. (without TT angle cut) Manual check result summary Fake total : (11+52+6+1)/2=35 → 16/400cm2 Fake total : (1+1+1+1)/2=2 → 3/400cm2 • All these Fake were rejected by eye check • ⇒ Hopeful to use for Brick Tagging

  24. Emulsion Scanning System“SUTS”

  25. Follow ShotOptics

  26. Non-stop tomographic image taking(follow shot method) Use Ultra High Speed Camera Up to 3k frames per second. Max 100views/sec～60cm2/h Image taking by follow shot No go-stop operation to avoid a mechanical bottleneck. FOV Motion and Blur are canceled by moving lens

  27. FIR filters Spatial filter and Pixel Packing Ring frame buffers Arrange readout segments to lines LVDS Camera Interface Camera In LVDS Output Interface Real-time Image Filtering and Packing Processor

  28. SUTS block diagram 1.3GB/s MASTER PC Camera front end image processor Slave PC Camera 150-300MB/s Stage Track recognition Slave PC 6-10MB/s Lamp Slave PC Piezo driver Piezo

  29. Internal Band width 21Gbyte/s/FPGA ×11 SUTS Track recognition board Processing speed : Up to 30cm2/h/board

  30. Scanning Efficiency Check Sample : double refreshed half size OPERA film exposed cosmic rays Scanning area ID B 10mm x 10mm pl 1 2 3 4 • Pick up prediction tracks • (pl1-pl2-pl4) • Search pl3 for basetrack (2sufaces) • window : dx,dy < +-3micron • dthx,dthy < +-70mrad Exist or not Cosmic ray Base Track Eff. Corresponds to sqrt of CSD eff.

  31. Angle displacement window : dx,dy < +-3micron dthx,dthy < +-70mrad

  32. Base Track angle resolution X proj q<0.1 X proj 0.1<q<0.2 X proj 0.2<q<0.3 X proj 0.3<q<0.4 3.2mrad 3.6mrad 3.7mrad 4.4mrad Y proj q<0.1 Y proj 0.1<q<0.2 Y proj 0.2<q<0.3 Y proj 0.3<q<0.4 3.5mrad 3.2mrad 3.7mrad 4.1mrad

  33. Base Track position resolution micron micron

  34. Base Track Efficiency window : dx,dy < +-3micron dthx,dthy < +-70mrad 90% (= 81% @CSD) Ph sum cut 0.0<=angle<0.1 : 16 0.1<=angle<0.2 : 16 0.2<=angle<0.3 : 14 0.3<=angle<0.4 : 14 0.4<=angle : 13

  35. Base Track Efficiency window : dx,dy < +-3micron dthx,dthy < +-100mrad 90% (= 81% @CSD) Ph sum cut 0.0<=angle<0.1 : 16 0.1<=angle<0.2 : 16 0.2<=angle<0.3 : 14 0.3<=angle<0.4 : 14 0.4<=angle : 13

  36. Efficiency Summary • Expected typical scanning efficiency is >80% with a doublet • >95% for one surface. • Why we found only 4 out of 7 ? • The not found events are very close to edge. • Fall in the gap between CSDs • Fluctuation due to low statistics

  37. Conclusions and Prospects • Succeeded to connect TT to Emulsion. • We found 4 out of 7 events. • 3 not found events are predicted on near edge • By using fourfold coincidence, the candidates are very few. No background tack were detected without TT cut by eye scan. • Usable for ‘Brick Tagging’ • Scanning efficiency is ~80% for the moment • Study reduce requirement like 3hits out of 4 surfaces • Studies for distortion, thickness and plate setting is going on. • Edge part efficiency will be confirmed. • Constructing Scanning facilities.

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