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OPERA experiment and Emulsion technique

OPERA experiment and Emulsion technique. Akitaka Ariga ariga@flab.phys.nagoya-u.ac.jp Nagoya university On behalf of OPERA collaboration Neutrino interaction vertex location method Large area scanning system Vertex location system PEANUT experiment Emulsion spectrometer summary.

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OPERA experiment and Emulsion technique

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  1. OPERA experiment and Emulsion technique Akitaka Ariga ariga@flab.phys.nagoya-u.ac.jp Nagoya university On behalf of OPERA collaboration Neutrino interaction vertex location method Large area scanning system Vertex location system PEANUT experiment Emulsion spectrometer summary

  2. CERN to Gran Sasso, neutrino beam CERN SPS 730km Gran Sasso地下研究所

  3. Event as seen by the target tracker CS ECC brick 8 cm p.h. Extract selected brick Vertex location Selected brick Sampling by Target Tracker planes ( X,Y ) Brick wall 10 cm

  4. Basic unit of Detector x 200,000 Event as seen by the target tracker p.h. Target Tracker １０ｃｍ 2.6ｃｍ ECC brick CS ECC CS Very low bg emulsion ECC Target tracker

  5. Vertex location procedure ECC CS TT Scanback method Large area scan~100cm2 Point Scan ~100x100mm2 neutrino emulsion emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion

  6. S-UTS Video

  7. Non-stop tomographic image taking(follow shot method) pixel High speed CMOS Drive object lens by piezo actuator 30~100Hz ~100 micron ~60micron Objective lens focus Emulsion layer (Stage)

  8. Internal Band width 21Gbyte/s/FPGA ×11 SUTS Track recognition board Processing speed : Up to 70cm2/h/board

  9. S-UTS data flow. 150~ 300MB/s 1.3GB/s High speed Camera 3,000 frame/s Front end image processor 0 suppression, pixel packing Track recognition 2~10MB/s ~0.1MB/s 2~10MB/s DAQ Data Base Raw data Pipe line processing Noise rejection Vertex reconstruction USERs

  10. 角度精度 ： 15 mrad 位置精度 ： 0.9 micron Total ~100,000,000 tracks 10cm 12.5cm

  11. 160micron 600micron Rock mu track from CNGS 2006 run CS view Hits on electric detectors X Z

  12. Vertex location procedure ECC CS TT Large area scan~100cm2 Point Scan ~100x100mm2 emulsion emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion Lead emulsion

  13. ScanBack system How many plates in 1 day? =20bricks * 57 plates = 1140 plates.

  14. Plate Changer Video

  15. ScanBack

  16. 160micron CS ECC 57plate 600micron OPERA location system has been tested and ready for the run. Rock mu from 2006 CNGS run. Scanback has been finished in 1 hour.

  17. An application of S-UTS : PEANUT • ECC + Counter Hybrid target • Same ECC structure as OPERA • Precision measurement for neutrino interaction. • ne/nm measurement. • Neutrino cross-sections.

  18. 9cm 10cm Full volume scanning by SUTS Read out for Target 2.5kg, 4.8x1019POT at MINOS ND. exp~50 nint ニュートリノビーム 10cm 9cm pl 56 pl 57 pl 55 Plate 1 ～ 20 plate 間の繋ぎ 30 plates ニュートリノ反応点候補 Vertex hunting

  19. Counter independent vertex location

  20. ne interaction candidate → NC interaction candidate neutrino PEANUT preliminary 1ry VTX Proton candidate (dE/dX measurement) e-shower 3X0 2electron from 1ry vtx e-shower 1mm 1mm e-pair  shower e-pair  shower Beam view Side view

  21. Compact spectrometer (30mm) for M-ECC Beam test for 0.5GeV~2GeV pion with B=1.057T C.Fukushima, H.Shibutya, Toho university. Air gap15mm Emulsion layer Emulsion layer Air gap15mm Emulsion layer B ・ B = 1.057[T] m+,e+ ECC spectrometer 30mm

  22. Test exposure at KEK T1 beam line. Test module inside 1T compact-permanent magnet p+ 0.5GeV p+ 1.0 p+ 2.0 Reference(B=0) p- 2.0 p- 1.0 p- 0.5 s pions em* air em air em 30mm *em consist of OPERA emulsion with 200micron TAC supporter on both side. The distribution of S (mean, width) is quite consistent with the bending and scattering. P resolution 15.6% 15.1% 15.3% 13.9% 13.1% 14.5% DATA * Proton contamination were rejected by dE/dx measurement

  23. Momentum resolution with current setup. Charge mis-identification probability for Pion. p[GeV/c]    charge-misID 2.0           0.00% 5.0           0.00% 10.0         0.02% 15.0         0.62% 20.0         2.72% (dp/p)Pos.Res. total error (dp/p)MS Calculation assuming position resolution = 1 micron dp/p ~0.14 + 0.030 x p [GeV/c] Farther improvement can be done by reducing materials (emulsion layer, TAC support) or change length. Technical paper will appear soon. C.Fukushima et.al.

  24. Summary • The scanning power and emulsion techniques are in progress. • Large area scanning. • Vertex location system. • We are ready for CNGS running. • Wide application of Emulsion detector. • ne/nm ratio, cross-sections measurement. • Emulsion spectrometer.

  25. Mass produced Emulsion Film Produced by the production line of the photographic color film Nuclear Emulsion (50m) Plastic base (200 m) Cross section Nuclear Emulsion (50m) Surface protection layer (1m) Enables to make direct contact with Lead plate Nuclear Emulsion

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

  27. スキャン負荷 Required Scanning Power for CS 1mm 50mm 0μevent 1μevent CHORUS 100mm

  28. Scanning Power Roadmap 1.5m2/day = 1000cm2/h x 15h

  29. LHC 100MByte/s BELLE 10MByte/s S-UTS Output Data Speed

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