CERN to Gran Sasso neutrino beam CERN SPS
CERN to Gran Sasso, neutrino beam CERN SPS 73 0 k m Gran Sasso地下研究所
OPERA ECC Brick Lead plate(1 mm) / Emulsion Film (OPERA film) Sandwich 1 mm 125 mm n 100 mm Pb Emulsion layers 100 mm 125 mm Lead Plate Emuslion Film (OPERA Film)
Expected Event Yield Target Mass : 1700 ton Full mixing, 5 years run @ 4. 5 x 1019 pot / year Clear ντCC events νμνe Interaction νμCC 23500 νμNC 7075 νμCC 494 νe. CC 188 νe. CC 17 Dm 2 1. 9 x 10 -3 e. V 2 2. 4 x 10 -3 e. V 2 3. 0 x 10 -3 e. V 2 B. G. Final Design 8. 0 12. 8 19. 9 0. 8
OPERA is an International Collaboration Brussels IPNL, IRES, LAPP Bern Neuchatel Zurich Hamburg, Münster, Rostock Zagreb Sofia INR ITEP JINR, Obninsk IHEP Beijing Shandong Aichi, Toho Kobe, Nagoya Utsunomiya L’Aquila, Bari, Bologna, Napoli, Padova, Roma, Salerno, LNF, LNGS Technion Haifa Gyeongsang University METU Ankara 37 INSTITUTIONS, ~160 PHYSICISTS 5
OPERA is an International Collaboration Brussels IPNL, IRES, LAPP Bern Neuchatel Zurich Hamburg, Münster, Rostock Zagreb Sofia INR ITEP JINR, Obninsk IHEP Beijing Shandong Aichi, Toho Kobe, Nagoya Utsunomiya L’Aquila, Bari, Bologna, Napoli, Padova, Roma, Salerno, LNF, LNGS Technion Haifa Gyeongsang University METU Ankara 37 INSTITUTIONS, ~160 PHYSICISTS 6
Super module 1 neutrino Muon spectrometer VETO Target Wall ECC & CS & TT HPT Magnet & RPC Super module 2
~200 k ECC bricks ECC Weight 64× 52 ECC/Wall Total 62 Walls ~ 1700 ton
ECC Wall
Integrated intensity 8. 24 E 17 pot Fri 12/10 Problems with controls 6. 72 E 17 pot Commissioning Physics Tue 9/10 18: 00 4 days of physics run, On average 1. 58 E 17 pot/day Fri 5/10 18: 00 3. 91 E 16 pot Sat 20/10 Problems with controls
日本での初イベント検出@ECCのタイムテーブル。 Oct 16 Films (CSd +ECC) arrival by FEDEX CSd films Drying @Nagoya Room humidity about 2 hours Start CSd scanning Every one CSd set takes about 2 hour For CC-like events CSd for NC-like events takes 12 hours 11: 00 13: 30 All first trial of CSd scanning was finished. Nagoya 1 st event (180277945, Brick 33540) was found on CSd 17: 00 Making ECC sheet for Scan. Back around 21: 00 (around Scan meeting) Start SB scan and stopped 56 pl from downstream. Midnight (Works need to be confirmed. ) Oct 17 Nagoya 2 nd event (179264151, Brick 20122 ) was found on CSd 11: 00 Making ECC sheet for Scan back for 2 nd event) 15: 00 Start SB scan 16: 00 The SB stopped 10 pl from downstream 17: 00 Vertex was confirmed with 4 partner tracks ! 25: 50
Event 179264151 Brick#20122 pl 10 Vertex confirmed with 4 partner tracks Nagoya 1 st Located neutrino Event Vertex confirmed Oct-18 01: 50 am
Found VTX information Event 179264151 Brick#20122 pl 10 theta_x (rad) theta_y IP VTx VTy VTz (rad) (micron) (micron ) ) Scan. Back. Trk -0. 116 0. 120 ----- Partner 1 0. 051 0. 011 0. 1 54340. 5 78851. 2 869. 1 Partner 2 0. 132 -0. 062 2. 0 54337. 7 78851. 4 855. 0 Partner 3 0. 439 -0. 003 2. 2 54343. 1 78851. 3 887. 6 Partner 4 0. 221 0. 116 0. 5 54341. 6 78850. 7 878. 3 All partner Trks are confirmed by Manual check.
ヨーロッパでの初イベント検出@ECCのタイムテーブル Event history from film development to event reconstruction… CS film development Wed. , Oct. 10 th Brick film development Thurs. , Oct. 11 th CS scanning Fri. , Oct. 12 th Brick transportation LNGS BARI Sat. , Oct. 13 th, 1. 30 p. m. CS scanning predictions LNGS BARI Sat. , Oct. 13 th , 2. 52 p. m. SB started Sun. , Oct. 14 th, 11. 50 a. m. Track disappearance Sun. , Oct. 14 th, 5. 25 p. m. Quasi-online reconstruction and event confirmation Sun. , Oct. 14 th, 5. 42 p. m.
Main muon Mu+ 43. 4 Ge. V/c 2 highest probability bricks: Wall 25, Tray 46, Cell 23 Wall 25, Tray 46, Cell 22 brick 53706 di-muon candidate
Event 179264151 Brick#20122 pl 10 Vertex confirmed with 4 partner tracks Nagoya 1 st Located neutrino Event Vertex confirmed Oct-18 01: 50 am
~200 k ECC bricks ECC Weight 64× 52 ECC/Wall Total 62 Walls ~ 1700 ton
Brick Manipulator System (BMS, LAPP France)
neut rino ECC 103 mm CS 79 mm 128 mm 0. 3 mm 1 mm • Filmと鉛板を交互に重ねた構造 • ECC総数 約20万個 – OPERA film 1200万枚 • νイベント数 31000 – (30 event/day) • OPERA Film × 57 plates Lead x 56 plates OPERA Film ντ 10~15 event Lead plate
Basic unit of Detector x 200, 000 Target Tracker 10cm CS ECC Event as seen by the target tracker ECC brick CS Very low bg emulsion ECC p. h. Target tracker 2. 6cm
Lead emulsion neutrino Lead emulsion Lead emulsion ECC Point Scan ~100 x 100 m 2 emulsion Vertex location procedure CS TT Large area scan~100 cm 2
S-UTS data flow. 150~ 300 MB/s 1. 3 GB/s High speed Camera 3, 000 frame/s Front end image processor 0 suppression, pixel packing Track recognition 2~10 MB/s ~0. 1 MB/s 2~10 MB/s Data Base USERs Raw data Pipe line processing Noise rejection Vertex reconstruction DAQ
Total ~100, 000 tracks 10 cm 角度精度 : 15 mrad 位置精度 : 0. 9 micron 12. 5 cm
Film 2枚=4乳剤層でノイズころし。 160 micron side view 600 micron X Z
Event 191987837 Brick#33479 full area scanning (2008/feb/08 manual check)
Event 191987837 Brick#33479 full area scanning 33479
Ev 18154300 Brick#53486
Ev 18154300 Brick#53486 Ev 181543007 Brick#53486
SUTS Scanning Log full area scan of 500 OPERA films Black : SUTS 01 Blue : SUTS 02 Red : SUTS 03 2007/05/15 2008/01/21
Lead emulsion neutrino Lead emulsion Lead emulsion ECC Point Scan ~100 x 100 m 2 emulsion Vertex location procedure CS TT Large area scan~100 cm 2
Plate Changer Brick Sheet
Volume Scan 5 plates VTX Plate 10 plates • Volume Scan Area is 1 cm x 1 cm from VTX point. • Scanning 5 plates upper VTX Plate and 10 plates below VTX Plate.
Ev 179264151 Brick#20122 23. 2 Ge. V/c 2470 tot pe 654. 7 mu pe
ν beam Cosmic ray tracks for the alignment 12 11 Plate 10 X projection 9 8 7 Event 179264151 Brick 20122 Stop at plate 10 6 5 4 3 Scanning area Lead 1 mm Emulsion film 0. 3 mm Scanback track (CS track)
Z projection Scanback(μ) X projection d a b 10 mm e y Scanback ( μ) a c x b c d electron 5 mm e 角度 aに対する再接近 距離 um a -0. 1088 0. 1143 - b 0. 0492 0. 0018 6. 96 c 0. 1193 -0. 0594 22. 58 !!!!!!! d 0. 2181 0. 1099 0. 65 e 0. 4429 -0. 0049 0. 19
Event 180277945 CC Ev 18027794 Brick#33540 Mu+ 8. 7 Ge. V/c HPT SM 1 Not workin g
i n n ary ar ary y ! ! !Pr !P !!P r e mi lim elim na in in a r a y !Pr !!!P ry!! ry ! e P r na lim eli re ry in m After 3 rd step (select correct tracks) X X partner trk 1 (p=234+96 -49 Me. V/c) X Muon (p=2610+979 -485 Me. V/c) XX partner trk 2 partner trk 3 (p=932 +235 -101 Me. V/c) Y Z
i n n ary ar ary y ! ! !Pr !P !!P r e mi lim elim na in in a r a y !Pr !!!P ry!! ry ! e P r na lim eli re ry in m Momentum of electrons (measured by angular method) PL 50 PL 51 p=160 Me. V/c p=467+76 -91 Me. V/c p=201+61 -38 Me. V/c p=244+40 -36 Me. V/c
i n n ary ar ary y ! ! !Pr !P !!P r e mi lim elim na in in a r a y !Pr !!!P ry!! ry ! e P r na lim eli re ry in m depth in lead ~ 50 m Event reconstruction in progress. . Volume-scan data being re-processed… Flight length ~5 mm 20 mrad kink. 47
i n n ary ar ary y ! ! !Pr !P !!P r e mi lim elim na in in a r a y !Pr !!!P ry!! ry ! e P r na lim eli re ry in m depth in lead ~ 50 m Event reconstruction in progress. . Volume-scan data being re-processed… Flight length ~5 mm 20 mrad kink. 崩壊Pt ~ 0. 1 Me. V. おそらくはハドロン二 次反応 μ粒子 48
i n n ary ar ary y ! ! !Pr !P !!P r e mi lim elim na in in a r a y !Pr !!!P ry!! ry ! e P r na lim eli re ry in m Main muon ~ 40 Ge. V/c 49 di-muon candidate
CNGS Electronics underground Designated “radiation safe” areas for electronics 52
Ventilation Electronics Layout Ventilation Units Service Gallery Ventilation Chamber Jun ga ction lle ry Proton Beam Line Target Chamber Temperature Probes …electronics equipment 53
Gy/yr for a nominal CNGS year of 4. 5 1019 pot 0. 1 - 10 No shielding With shielding (caveat: the option simulated in TSG 41 does not include the ventilation ducts) 54
2008 run : SPS schedule May 29 th 147 days max for the CNGS Spread over 23 weeks (Nominal CNGS year : 200 days) November 10 th 55
2008 run : expected statistics Expected 2008 run Nominal CNGS 147 200 48 27. 6 Number of days Super Cycle (sec. ) Circulating proton 3. 8 1013 4. 5 1013 4. 8 1013 70% 80% 55% 2. 1 1019 2. 9 1019 4. 5 1019 efficiency Integrated pot Minimal granted by CERN If no delay in the CNGS repair Total number of interactions 2770 CC events 2070 NC events 455 Electron events 16 Charm decay 83 Tau candidate (@2. 5 10 -3 e. V 2) ~120 evts/week 1. 1 56
τ detection efficiencies(in % and including BR) θkink > 20 mrad impact parameter I. P. > 5 to 20 μm DIS long t® e t® m t® h 2. 7 2. 4 2. 8 8. 0 Total BR 2. 3 2. 5 3. 5 8. 3 DIS short 1. 3 0. 7 1. 3 Overall (weighted) 3. 4 2. 8 2. 9 9. 1 % Efficiency for the: channel Evt long 0. 176 QE long 0. 39 6. 8% Localization 0. 73 Kink+ kinematics 0. 73 Id + ECC connection 0. 80 Others 0. 96 2. 8%
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