NOON04 Status of OPERA1 Status of OPERA OPERA Collaboration Nagoya University M. Komatsu

NOON04 Status of OPERA2 Contents Experiment overview Construction LNGS –Spectrometer and Support structure –Target Tracker (TT) –Brick Manipulation System (BMS) Emulsion Japan Fuji film –Emulsion refresh Tono mine Schedule

NOON04 Status of OPERA3 COLLABORATION 36+1 groups ~ 165 physicists Russia INR Moscow, ITEP Moscow, JINR Dubna, Obninsk Belgium IIHE(ULB-VUB) Brussels France LAPP Annecy, IPNL Lyon, LAL Orsay, IRES Strasbourg Germany Berlin, Hagen, Hamburg, Münster, Rostock Israel Technion Haifa Italy Bari, Bologna, LNF Frascati, L’Aquila, LNGS, Naples, Padova, Rome, Salerno Japan Aichi, Toho, Kobe, Nagoya, Utsunomiya Switzerland Bern, Neuchâtel Turkey METU Ankara China IHEP Beijing, Shandong Croatia Zagreb University Bulgaria Sofia University Korea Gyeongsang Korean group joined

NOON04 Status of OPERA4 Nominal beam  ( m -2 / pot) 7.45x10 -9  CC / pot / kton 5.44x ( GeV ) 17 ( e + e ) /  0.85 %  /  2.0 %  prompt negligible The CNGS beam CERN to Gran Sasso L=730km Designed for  appearance experiment

NOON04 Status of OPERA5 OPERA/CNGS1 an hybrid detector supermodule 8 m Target Trackers Pb/Em. target Electronic detector  finds the brique of interaction   ID, charge et p Emulsion analysis  vertex  decay kink  e/  ID, multiple scattering, kinematics Extract selected brick Pb/Em. brick 8 cm Pb 1 mm Basic “cell” Emulsion

NOON04 Status of OPERA6 Detection of ν τ CC in DONUT All tracks in the Scanning region （ 4179 tracks ） Reject passing through tracks (420 tracks remained ） Reject Low momentum tracks (114 tracks remained ） Vertex detection : Neutrino interaction and decay of short lived particles 膨大な ごみ飛跡の中から Interaction Point Decay Point of  N.Nonaka, M.Komatsu(Nagoya Univ. ) K.Kodama (Aichi Univ of Edu.) Nagoya for DONUT Analysis. Event Reconstruction neutrino 

NOON04 Status of OPERA7 Expected number of events signal (  m 2 = 1.3 x eV 2 ) signal (  m 2 = 2.0 x eV 2 ) signal (  m 2 = 3.0 x eV 2 ) BKGD Final Design full mixing, 5 years 6.76x10 19 pot / year 3 YEARS5 YEARS 44 44 33 33 SK 90%CL

NOON04 Status of OPERA8 OPERA sensitivity to  13 Only 15% increase scanning because the event location is already performed for  search. Preliminary 2.5x10 -3 eV  7° sin 2 2  13  m 2 23 (eV 2 ) pot/yr pot/yr syst. on the e contamination up to 10% By fitting simultaneously the E e, missing p T and E vis distributions we got the sensitivity at 90% NC   e e beam    Events Missing p T (GeV)

NOON04 Status of OPERA9 OPERA Experiment Layout in the Underground lab Underground assembly space ( ) 4 m corridor 48 m Hall B Borexino Hall C Pb-emulsion stacking brick packing BAM Emulsion storage

NOON04 Status of OPERA10 Dipolar Magnet : Construction Iron slabs ordered and being delivered Yokes, coils, supplies ordered starts installation : may 2003, resumed august 03 Will be Finished in Early 2005 Hall C Gran Sasso

NOON04 Status of OPERA11

NOON04 Status of OPERA12 Cosmic ray test setup  4x4 m 2 Glass RPC for trigger and tracking ● 36 OPERA RPC under test ● Horizontal and vertical strips with 3.5cm pitch and digital readout. ● In total 5000 channels ● The current of each RPC measured with 2nA resolution and monitored during the test. ● Gas 12 parallel lines 3 RPC in series (like in OPERA detec.) 48% Ar, 48%, 4% isobutane We are requesting gas operation for RPC Hall C

NOON04 Status of OPERA13 TT module construction Construction procedure well established after wall 0 construction, Construction will start the 9th of February Procedure of tests and calibration already established. About 10% of strips already delivered. (3,000/32,256) Wall 0 Strasbourg

NOON04 Status of OPERA14 Fibre gluing system old system new system glue-hardener mixing done before filling syringes, change syringes after every gluing, problem with exothermic reaction (brutal glue temperature elevation), 16 strips glued at the same time. glue-hardener mixing during gluing, just clean and reuse syringes (once per day), 2x16 strips glued at the same time, at least 160 strips/day.

NOON04 Status of OPERA15 Target Tracker (assembly at Strasbourg)  XY planes, 7000m 2 in total  Scintillator strips 7m x 2.5cm x1cm  AMCRYS-H (Kharkov) + Kuraray WLS  1000 MaPMT Hamamatsu 64channels  Dedicated Front End electronics for gain correction  Autotriggerable and 1/5 p.e Trigger + Brick Finding Well above 5 p.e. / readout end (in the middle: worst case for two-end readout) 7m

NOON04 Status of OPERA16 x-y scanning tables 2 tables are necessary for the production, table 1 ready, we are waiting for electronics to start testing wall 0, table 2 ordered and ready by beginning of February 2004, 5 electron spectrometers ready and calibrated (2/table + 1 spare). DAQ cards (at least prototypes) urgently needed to prepare module scanning procedure. PMT ROCs FE board DAQ board HV- module LED LED-pulser

NOON04 Status of OPERA17 Delivery at Gran Sasso OPERA 1400 m delivery storage in hall B

NOON04 Status of OPERA18 The support structure for the “brick walls" wall Tensioning from the bottom Suspension from the top Brick loading test Height ~ 6. 7 m Full size proto built by ILMA Delivery at LNGS : june 2004 Installation schedule is same as TT

NOON04 Status of OPERA19 Brick Manipulator System (BMS) To perform quasi-online analysis, daily extraction Will be done by BMS

NOON04 Status of OPERA20 BMS prototype tests with VV Naples-Frascati wall VV cable VV cable loop driving system CCD Camera The Vacuum sucker Vehicle (VV) 50 bricks/day ~ 3 hours

NOON04 Status of OPERA21 Element of the OPERA detector ECC Brick (8.3kg) Vacuum Packed Total Number of ECC bricks : 206,336 Bricks

NOON04 Status of OPERA22 ECC Brick Sandwich of Emulsion Films and Lead Plates 125mm 100mm Pb Plates Emulsion films 125mm 100mm Lead Plates （１ mm thick ） 56/Brick Emulsion films 58/Brick Weight 8.3 kg 200,000 bricks 12,000,000 emulsion plate

NOON04 Status of OPERA23 Develop Initial sensitivity ProductionBeam exp. Refresh process Refresh result Sensitivity aging after refresh Grain density 35/100  m Nearly perfect erasing No sensitivity degradation after refresh Emulsion refresh developed in Nagoya University with Fuji film Co. Key feature for OPERA experiment to get low BG emulsion. Temp. 30 ℃, R.H. 98%, 3days Grain density ~8/100  m ProductionBeam exp. Grain density 35/100  m Develop ProductionRefresh process Beam exp. Develop

NOON04 Status of OPERA24 Tono Mine Nagoya Osaka Tokyo Cosmic ray reduction 1 st hall : 45m deep, 1/50(115m.w.e.) 2 nd hall : 96m deep, 1/400(220m.w.e.) Japan Nuclear Cycle Development Institute Tono Geoscience Center Refresh Facility 1 st Hall 2 nd Hall Tono Mine

NOON04 Status of OPERA25 Tono Mine : 2 nd 96m before construction (Mar. ’03)

NOON04 Status of OPERA26 Installation of 14 refresh chambers in 2 nd hall. (May.-Jul. ’03)

NOON04 Status of OPERA27 Spread emulsion films on tray.

NOON04 Status of OPERA28 Store trays into refresh chamber. 8,100 films / chamber

NOON04 Status of OPERA29 Four people work in same time

NOON04 Status of OPERA30 To be refreshed, films delivered from Fuji film. (May. 26 ’03) A box contain 2030 films : 1,654,914 films are already delivered.(14% of total)

NOON04 Status of OPERA31 Number of refreshed films Jan.,2003Jan.,2004Jan.,2005Oct.,2005 both facility full speed run 1st facility full speed run completion of 2nd facility expected line → Stored in Tono Mine (about 14%). Already Refreshed m^2 1 st facility is not full run yet. If both facility runs with full force, 520m^2 films are refreshed in a day. Real refresh started on Jan/13/2004

NOON04 Status of OPERA32 Our goal is 3,600m (300  m x 12,000,000 films) GOAL Fuji Film Co. 14% of total Processed 1.3% of total

NOON04 Status of OPERA33 Milestones and Conclusion Milestones 1.november 2003 starts SM1 Magnet RPC installation OK 2.September 2004starts SM1 Target installation 3.January 2005BAM and BMS installation 4.July 2005 starts filling bricks  Important Physics Program First evidence of  -  appearance in few years data taking In a five years run: 11 signal (SK best fit) and 1.06 background events Studies to improve efficiency and to reduce the background Significant measurement of  13 (7 -3 eV 2 Preliminary)