Status of the T2K Experiment

1. Status of the T2K Experiment J-PARC PAC KEK July 6, 2007 Dave Wark Imperial/RAL

2. 1R-m Energy spectrum SuperK SNO Soudan II MACRO 71±5 71±5 KamLAND Evidence for n oscillations from… Early Solar Neutrino Exps. MINOS K2K Has shown that neutrinos have mass and oscillate.

3. The Maki-Nakagawa-Sakata-Pontecorvo Matrix Three Angles If neutrinos have mass: For three neutrinos:

4. The Maki-Nakagawa-Sakata-Pontecorvo Matrix Two mass differences If neutrinos have mass: For three neutrinos:

5. The Maki-Nakagawa-Sakata-Pontecorvo Matrix CP violating phase d If neutrinos have mass: For three neutrinos:

6. A happy announcement…

7. Current knowledge of oscillation parameters. IAC07 T2K Dave Wark Imperial College/RAL q23, Dm232 q12, Dm122 Solar + KamLAND SK +K2K+ MINOS MiniBooNE has failed to confirm the single piece of counterevidence

8. IAC07 T2K J.W.F. Valle, hep-ph/0410103 Dave Wark Imperial College/RAL What about q13?

9. Three neutrino mixing. If neutrinos have mass: ~0.03 ~p/4 And sin22q13 < ~0.14

10. IAC07 T2K nm disappearance sin22q13 sin22q23 Dm232 Dave Wark Imperial College/RAL What will T2K Add? ne appearance First phase of a longer programme which could have sensitivity to CP violation!

12. IAC07 T2K Dave Wark Imperial College/RAL Super Kamiokande Rebuild

17. Project Integration and Schedule • 280m detector hall will not be fully available until February 2009, producing a severe challenge for the installation of the 280m detectors. • As recommended by the PAC, we have formed an Integration Group of the detector engineers, organized by Alan Grant and Cormac Neeson, to do detailed planning of the detector installation. • Meeting planned for July 10/11 at Imperial, 19 engineers will be in attendance.

18. Project Integration and Schedule

19. Project Integration and Schedule • Obviously such an integration programme is complex and interconnected (and something could slip), however… • Previously all installation was scheduled for Feb-March, now just the INGRID • For beam commissioning only the INGRID and muon monitors are really needed, and these have few linkages to the other detectors. • The neutrino spectrum can me measured with just the magnet, FGDs, and TPCs. • We should therefore be able to make efficient use of the beam from day one.

20. IAC07 T2K Dave Wark Imperial College/RAL Other Progress and Issues • The T2K Collaboration has adopted an International Collaboration Agreement. • This replaces the provisional governing structure of the collaboration with a governing arrangement fairly typical of international HEP projects: • Spokesman and International Co-Spokesman • Executive Committee and Institutional Board • Publication policy • Speakers bureau… • We are forming new Working Groups for T2K-SK analysis and Global Analysis

21. Canada Contributions: All the FGD except photosensors TPC mechanical and field cage, integration, gas system Slow Controls and Monitoring Cont. to Beamline: OTR Monitor, Remote handling for hot cell, beam position/profile monitors and vessel Funding situation: secured with yearly review France Contributions: INGRID detector (LLR) TPC Micromegas and FE electronics (Dapnia) TPC BE electronics (LPNHE) Beamline quench detection system Power supply for the UA1 magnet Funding situation: secured. Contributions and Funding by Country

22. Germany Contributions: UA1 Magnet moving system TPC gas monitoring Funding situation: request submitted. Italy Contributions: UA1 Magnet preparation TPC elements? Very uncertain… Japan Contributions: J-PARC Most of SK, and the SK rebuild and upgrades Most of the T2K beamline, target, and beam dump including beamline monitors and muon monitor Infrastructure for the 280m facility INGRID detector FGD photosensors SMRD FEE Cont. to NA61 Funding situation: secured, with additional funding from MEXT in form of competitive grants. Contributions and Funding by Country

23. Poland Contributions: Cont. to SMRD Cont. to NA61 Funding situation: request submitted Russia Contributions: Cont. to SMRD Funding situation: secured South Korea Contributions: Beamline proton monitor electronics Funding situation: secured Spain Contributions: TPC testing, calibration, and gas monitoring Cont. to UA1 magnet Funding situation: secured Switzerland Contributions: Cont. to TPC mechanics, testing, and assembly Major contributions to NA61 Major Cont. to UA1 magnet Funding situation: secured subject to annual review Contributions and Funding by Country

24. United Kingdom Contributions: BEE for ECAL/P0D /SMRD/INGRID Cont. to beamline - beam window, baffle, and engineering for target and dump design, target remote handling Basket/basket stand ECAL (all) FEE design for P0D/SMRD/INGRID DAQ for 280m Cont. to UA1 magnet Funding situation: ~60% secured, funding for the Barrel and P0D ECALs deferred for decision this year. United States Contributions: Cont. to SK, including upgrades, rebuild, and new SK electronics P0D (all) Beamline - SC corrector magnets, 2nd horn, monitor electronics and GPS Cont. to SMRD Funding situation: secured, with forward cash flow from institutions(!) Contributions and Funding by Country

25. Overall funding situation… • Mostly good. The only major uncertainty for committed items is the UK funding for the ECAL, which we should find out later this year. • However: • There is no overall cash reserve or contingency for the project. • A number of items have been identified which fall in the cracks between commitments, the most notable of which is the magnet installation (precise cost estimates are not yet available for some of these items).

26. Magnet Installation

27. Magnet Installation

29. Overall funding situation… • Mostly good. The only major uncertainty for committed items is the UK funding for the ECAL, which we should find out later this year. • However: • There is no overall cash reserve or contingency for the project. • A number of items have been identified which fall in the cracks between commitments, the most notable of which is the magnet installation (precise cost estimates are not yet available for some of these items). • We tried to cover this by extending the operating Common Fund forward two years into the construction period. • This has not been immediately accepted by all funding agencies, and we are negotiating. • The total amount is small compared to the project cost, but the last bit is always hardest to find…

30. Overall funding situation… • The situation with the final funding for completion should properly be the remit for an International Finance Committee made up of representatives from the funding bodies. • We would welcome help from KEK in rapidly forming such a committee to help us finalize funding arrangements for installation and integration.