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OPERA/CNGS1 O scillation P roject with E mulsion-t R acking A pparatus

OPERA/CNGS1 O scillation P roject with E mulsion-t R acking A pparatus. Electronic detectors status of installation Results from detectors commissioning TT RPC HPT Cosmic and CNGS run results Brick production and filling Emulsions analysis Scanning facilities

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OPERA/CNGS1 O scillation P roject with E mulsion-t R acking A pparatus

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  1. OPERA/CNGS1 Oscillation Project with Emulsion-tRacking Apparatus • Electronic detectors • status of installation • Results from detectors commissioning • TT • RPC • HPT • Cosmic and CNGS run results • Brick production and filling • Emulsions analysis • Scanning facilities • Track matching and analysis • Test beam activities • Detector filling strategy and CNGS runs • OPERA sensitivity updated • Conclusions LNF Scient. Comm

  2. Electronic detectors installation Veto Spectrometer: Magnet, RPC, XPC,HPT SM2 BMS Target Tracker HPT/2 Ago ‘06 run: all installed and running except Veto and HPT/2 May ‘07 : Veto and HPT/2 installed and under commissioning LNF Scient. Comm

  3. Event building: time stamp Event building by sorting in time individual hit from sub-detectors 10 nsec binning TT RPC HPT The time stamp (10 nsec bin) is correlated with the GPS (100 nsec resolution) in order to select CNGS beam event LNF Scient. Comm

  4. Event reconstruction: time stamp resolution With position correction Sigma : 9 nsec Without fiber transmission correction Time difference Strip number down going muon : side view LNF Scient. Comm

  5. 3. Results from electronic detectors commissioning LNF Scient. Comm

  6. Target Tracker efficiency using cosmic ray tracks 1 p.e. 2 p.e. 3 p.e. • Trigger rate: • 1 p.e.  20 cps per pixel • 2 p.e.  10 cps per pixel LNF Scient. Comm

  7. SM1 SM2 1 HV row missing Electronics RPC efficiencies using cosmic ray tracks All problems have been cured LNF Scient. Comm

  8. RPC spatial resolution using cosmic ray tracks Tracking resolution ~ 1.3 cm, Misalignments ~ few mm LNF Scient. Comm

  9. RPC p reconstruction using cosmic ray tracks Muon momentum reconstruction using only RPC - RPC data only very preliminary LNF Scient. Comm

  10. Status of HPT/1 • Timing corrections implemented • Resolution of ~500mm in single planes • Fine alignment ongoing with CR tracks • 80% track efficiency for cosmic data • reconstruction running stable for data LNF Scient. Comm

  11. 4. CNGS runs and cosmics results LNF Scient. Comm

  12. 10.5 ms 10.5 ms 50 ms August’06 run: first CNGS neutrinos spill machine energy LNF Scient. Comm

  13. August ‘06 run events nmCC in magnet stopping track (first event) LNF Scient. Comm

  14. August ‘06 run events nmCC in magnet nmCC in TT LNF Scient. Comm

  15. Select events around beam (0 <  < 0.15 rad) direction and check if there are on time August ‘06 run: Beam Direction OPERA Zenith angle of muon track y qy >0 z qy <0 August Run result: <>=3.4±0.3 LNF Scient. Comm

  16. Data reduction Azimuth angle (rad) μCC in the magnets • Event selection: • on time beam events • μ id (> 10 Fe slabs) • fiducial volume August + October Data = 36 ± 6 evt. MC = 29.9 evt. • August only with 2 cut • Data = 29 ± 5 evt. • MC = 23.7 evt. • CC in magnets selection efficiency 52% • very pure sample, NC contamination 4% (1,1 event) LNF Scient. Comm

  17. High energy muon charge ratio Can be measured in using the OPERA spectrometers : Overburden : ~3000 m.w.e.  Eμ underground : 300 GeV Eμ surface cut-off : 1400 GeV LNF Scient. Comm

  18. 5. Brick production and filling LNF Scient. Comm

  19. Brick components: lead Lead vs emulsion chemical & radioactivity compatibility tests LNF Scient. Comm

  20. Brick components: lead • Mass production started at JL-Goslar in Jul ‘06 • Custom production line for casting, lamination, washing and packing • Up to 800 brick/day granted LNF Scient. Comm

  21. Initial sensitivity Produ-ction Beam exposure Develop-ment After refreshing Produ-ction Beam exposure Refreshing Development Production Refreshing Beam exposure Development Brick components: emulsion Performance of refreshed emulsion films G.D. 36/100μm F.D.1.3/1000μm３ G.D.below 8/100μm F.D.2.1/1000μm３ Condition : 30℃98％3days Sensitivity of refreshed film G.D.33/100μm F.D.1.5/1000μm３ LNF Scient. Comm

  22. BAM: lead loading and drum section (in light) station for filling the BMS drums lead box loading (one day work) LNF Scient. Comm

  23. BAM: dark room for 5 piling stations LNF Scient. Comm

  24. BAM: piling and pressing station LNF Scient. Comm

  25. B r i c k P r o d u c t i o n 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 b r i c k s u m 5 0 0 0 Bricks w e e k l y b r i c k s 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 W e e k s BAM milestone and performance • Costruction started in Jan ‘05 in firm site • Delivery at LNGS starting in Jun ‘06 • Comissioning and preproduction for Oct run in Sept ‘06 • Many improvements since Mar ‘07 • Production in rather stable conditions since Mar-Apr ‘07 • Up to last week 14.000 bricks produced • Production rate: 450 - 600 brick/day, ie 2-2.5 drums/day last week LNF Scient. Comm

  26. BMS (Brick Mainipulation System) Portico Loading station and drum for brick transfer Vacuum sucker vehicle to retrieve bricks Draw bridge for brick insertion Camera for positioning Manipulating platform Filling performance: 2 drums/day Storage Carrousel LNF Scient. Comm

  27. 6. Emulsion analysis LNF Scient. Comm

  28. Event reconstruction in the brick LNF Scient. Comm

  29. Automated Microscopes for Nuclear Emulsions ~ 30 bricks will be daily extracted from target and analyzed using high-speed automatic systems European Scanning System S-UTS (Japan) scanning speed ~ 20 cm2/h scanning speed ~ 30 cm2/h High speed CCD Camera (3 kHz) Piezo-controlled objective lens Hard-coded algorithms Synchronization of objective lens and stage Customized commercial optics and mechanics + asynchronous DAQ software Constant speed stage LNF Scient. Comm

  30. Scanning capabilities in Europe • 30 ESS distributed among 11 labs ( 22 ESS in 8 Italian labs ): • Bari, Bern, Bologna, Lngs, Lyon, Napoli, Roma, Salerno + • + Neuchatel, LNF, Padova • CSD scanning : • 6 ESS at LNGS -> ~ 8CSdoublet/day ( ~5 microscopes missing ) • Brick Vertex location and confirmation : • Italy : 12 10 bricks/day • EU : 6 ESS  5 bricks/day • plate changer in progress ( with dry and oil objectives ) • Dedicated to Special events ( min. bias, decays, electrons, …): • Italy : 4 ESS ~ 200 events/yr • EU : 2 ESS ~ 100 events/yr LNF Scient. Comm

  31. Electronic detector-brick connection • Connection between Electronic trackers and CS: • tested on few events (~10) • good results (~70-80%) • space for improvements T T Predicted position CS Located position Ago’06 run LNF Scient. Comm

  32. angular residuals between base-tracks and fitted volume tracks (vertical tracks) position residuals between base-tracks and fitted volume tracks scan-back efficiency 93.1% Track Reconstruction and Vertex Search tracks in the CS doublet scan-back tracks followed backward film by film volume scan vertex reconstruction 1.7 mrad 0.3  LNF Scient. Comm

  33. First neutrino event in emulsion • October CNGS run: • CNGS induced rock muon selected by electronic detectors • brick tagging using the reconstruction software • CSD and brick analysed using the standard scanning system • Prediction accuracy : • Δx = 5.5 mm (along the tray) • Δy = 0.4 mm (vertical direction) • Δθx = 16.6 mrad • Δθy = 24.8 mrad • Muon momentum: • MCS (coord method) : 6.4 ± 1. GeV/c • Spectrometer (RPC) : 7.05 ± 0.4 GeV/c LNF Scient. Comm

  34. RMS 1.1μm RMS 0.8μm Brick emulsion alignment with cosmics CNGS rock muon analysis LNF Scient. Comm

  35. 8. Detector filling strategy and CNGS runs LNF Scient. Comm

  36. Detector filling • Assumptions : • Number of bricks on the end of April: 10000 (ok) • Ramp up from average actual speed 4 drums/w to 10 drums/w on April 30th (~ok) • Reaching 15 drums/week on september 1st  Full target filled (150000 bricks) in May 2008 (including 15%contingencies and 3 weeks for holidays) SPS tentative schedule : 2008 Physics starts end of april LNF Scient. Comm

  37. x 1019 3/9/07 11/11/07 19/3/07 days days Integrated p.o.t Total number of interactions CNGS run in 2007 ~20 Charmed hadron decay LNF Scient. Comm

  38. 9. OPERA sensitivity updated LNF Scient. Comm

  39. OPERA sensitivity : nominal conditions Opera with beam upgrade and 30% bck reduction 90 % CL Sensitivity F&C Opera, with beam upgrade (1.5) Opera with 30% bck reduction Opera nominal SK 90% CL (L/E analysis) LNF Scient. Comm

  40. OPERA sensitivity : nominal conditions 90 % CL Sensitivity F&C 25% reduction Opera with 30% target mass reduction Opera nominal SK 90% CL (L/E analysis) LNF Scient. Comm

  41. 10. Conclusions • Very effective contribution to the experiment installation by LNF Servicies (Spas, SSCR, Electronic) • Support from LNF still needed for construction, running and analysis ( workshops, fellowships, ….) • The electronic detectors of the OPERA experiment are ready for data taking during the fore coming CNGS runs • The brick production is launched and the detector should be filled before the physics run in 2008 • The data analysis chain has been validated for the : • electronic detectors during the CNGS beam periods and also with cosmic rays in 2006 • emulsion detectors during many test runs, especially with real neutrino event from an exposure in the NUMI beam • OPERA Physics program is valid, and it is a great opportunity for young physicists to learn about Neutrino Physics with real data LNF Scient. Comm

  42. - n Decay “kink” nm - nm oscillation n t- nt ~1 mm Detection of the nt appearance signal The challenge is to identify ntinteractions from ninteractions Toplogy selection:  Kink signature • Two conflicting requirements: • Large mass  low Xsection • High granularity  signal selection  background rejection • Target:1800 tons, 5 years running • 30 000 neutrino interactions • ~150 ntinteractions • ~15 nt identified • < 1 event of background LNF Scient. Comm

  43. 8 cm Electronic detectors: Emulsion analysis: Vertex, decay kink e/gID, multiple scattering, kinematics 8 m Spectrometer Target Trackers Pb/Em. target supermodule Link to mu ID, Candidate event Pb/Em. brick Basic “cell” Pb Emulsion 1 mm Extract selected brick Brick finding muon ID, charge and p OPERA/CNGS1 : an hybrid detector • What the brick cannot do: • trigger for a neutrino interaction • muon identification and momentum/charge measurement need for an hybrid detector LNF Scient. Comm

  44. 1 mm t n 8.3 Kg  Interaction From NUMI exposure Pb Emulsion layers 10.2cm 12.5cm Electron shower OPERA bricks 1 ECC= 56 Pb + 57 emulsions • ECC : target basic component • Em Provides high space resolution • + Lead active target mass • Compact and modular structure 10 X0’s 2 emulsion layers (44 m thick) poured on a 200 m plastic base LNF Scient. Comm

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