The Status of the OPERA experiment II 2006.10.31 Toshiyuki Nakano

Target Tracker signals of Rock muon (2006/08/18 05:25:46 GMT) Top　View Side　View MuFlux = 1m2/h (1/M) 08/18- 2weeks 10/19- 3weeks 174969(NGY)

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

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

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

Target Tracker signals of Rock muon (2006/08/18 05:25:46 GMT) Top　View Side　View OPERA films 300 set of CSD MuFlux = 1m2/h (1/M) 08/18- 2weeks 10/19- 3weeks 174969(NGY)

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

174969(NGY) 11.5x6cm2

Automatic Emulsion Scanning System “S-UTS”

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

CS Doublet cross section 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 q1 q2 q3 q4 qcs1 qcs2 Dr

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 applying TT selection, dqX<50mrad & dqY < 50mrad Remained 1 candidate track out of 8 Confirmed by Eye Scan.

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 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)

EV174969 Found Track parameters Comparison to the TT prediction 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

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

9516652(NGY)

9516652(NGY) 8x6cm2

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

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 1 candidate track out of 3 Confirmed by Eye Scan

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

EV9516652 Found Track parameters Comparison to the TT prediction 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

All tried predictions on CSD Event# Event Type distribution POS. X (cm) Y (cm) aX (rad) aY (rad) Most probable CSD 124528 Nuint NGY -105.6 -212.2 -0.071 0.182 06-09 174969 Rock -249.0 -254.1 -0.134 0.017 02-20 4191558 -164.5 -225.5 0.023 0.030 04-13 9507801 -11.8 -130.2 0.080 0.069 13-01 9516652 -25.8 -189.8 0.101 08-03 3874834 -81.8 -146.4 -0.053 0.165 12-07 4814867 -236.7 -154.7 -0.019 0.089 11-19 Found 4 out of 7 predictions ⇒ Should be checked efficiency

All these Fake were rejected by eye check CSD background component in full scanned angular space. (without TT angle cut) Manual check result summary CSD with KCl(14hours) (total scanning area ~ 880cm2) fog+fog fog+cmpton cmpton+cmpton Black+Black 11 52 6 1 Fake total : (11+52+6+1)/2=35 → 16/400cm2 Normal CSD (total scanning area ~ 280cm2) fog+fog fog+cmpton cmpton+cmpton Black+Black 1 Fake total : (1+1+1+1)/2=2 → 3/400cm2 All these Fake were rejected by eye check ⇒ Hopeful to use for Brick Tagging

Emulsion Scanning System “SUTS”

Follow Shot　Optics

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

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

SUTS block diagram MASTER PC Camera front end image processor Slave PC 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

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

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 ne Exist or not Cosmic ray Base Track Eff. Corresponds to sqrt of CSD eff.

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

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

Base Track position resolution micron micron

Base Track Efficiency 90% (= 81% @CSD) 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

Base Track Efficiency 90% (= 81% @CSD) 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

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

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.