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NUMI/MINOS Status

NUMI/MINOS Status. J. Musser for the MINOS Collatoration 2002 FNAL Users Meeting. Summary. Quick summary of status of directly relevant neutrino oscillation results. Even quicker summary of MINOS physics reach. Status of construction at far and near sites.

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NUMI/MINOS Status

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  1. NUMI/MINOSStatus J. Musser for the MINOS Collatoration 2002 FNAL Users Meeting

  2. Summary • Quick summary of status of directly relevant neutrino oscillation results. • Even quicker summary of MINOS physics reach. • Status of construction at far and near sites. • Results from ‘CalDet’ test beam running • Results from Far Detector commissioning and data taking using cosmics. • Bottom Line: Everything looking good!

  3. SuperK Status (Neutrino 02)

  4. SuperK ntDetection

  5. 3 ComponentMixing

  6. K2K Allowed Region Far Detector event sample: 56 FC events

  7. MINOS Physics Goals • Demonstrate presence of oscillations. • A number of detection channels are available to us. Best is comparison of near/far CC energy spectrum. The beamline and detectors are designed to do this with a total systematic error of < 2% per 2 GeV bin. • Provide precision measurements of oscillation parameters. • Provide determination of flavor participation to 2%. • Comparison of oscillation parameters for atmospheric neutrinos and antineutrinos.

  8. CC Energy Distribution Channel Note: 10 kt. Yr. = ~ 2 live years of running. Results still statistics limited at that time.

  9. CC Energy Distribution -Based Limits and Confidence Regions

  10. nm-ne Mixing MINOS will probe U13 in critical SuperK allowed region. Off-axis measurements facilitate studies of this channel.

  11. Det. 2 Det. 1 Far Detector: 5400 tons Near Detector: 980 tons

  12. The Far Detector • 8m octagonal steel & scintillator tracking calorimeter • Sampling every 2.54 cm • 4cm wide strips of scintillator • 2 sections, 15m each • 5.4 kton total mass • 55%/E for hadrons • 23%/E for electrons • 486 planes of scintillator • 95,000 strips

  13. The Near Detector • 3.8 x 4.8m “octagonal” steel & scintillator tracking calorimeter • Sampling every 2.54 cm • 4cm wide strips of scintillator • 1 sections, 16.6m length • 0.98 kton total mass • 55%/E for hadrons • 23%/E for electrons • 282 planes of steel • 153 planes of scintillator • 11,616 strips

  14. MINOS Active Detector

  15. FarDet Plane Installation Top view, showing fiber readout cables Plane view, looking South

  16. Far Detector Installation • Planes are now being installed and checked out at a rate of roughly 6 per week. This exceeds our original installation rate estimates. • Next milestone: Energizing the magnetic field on the first Supermodule (1/2 far detector). This takes place in July, and represents the halfway point in far detector installation. • Commissioning and CR-based physics running on the Far Detector is taking place during installation - some results later in the talk.

  17. Near Detector Construction Scint. Modules Installed on Near Detector Plane. Assembly Area in New Muon Lab

  18. NUMI Tunnel and Hall Construction Target Shaft Area MINOS Shaft Area Bulkheads Decay pipe (546 ft of 2193ft) MINOS Service Target Service Bldg Beam Absorber Access Tunnel 1,250ft 600ft 225ft 2,193ft MINOS Service Bldg Target Service . EAV-1 EAV-2&3 EAV-4 Extraction Hall MINOS Sump Decay Tunnel (21’6”D + 4’walkway) Beam Absorber MINOS Hall Tunnel Carrier Tunnel (10’ x 10’) MINOS Hall Muon Detectors Target Hall (35’W x 32’H x 150’L) (25’W x 30-60’H x 175’L) MINOS Near Detector Excavated Excavation Complete! Decay Pipe now being laid in.

  19. Tunnel Construction Decay walkway forms on the right (5/2/02) Work is proceeding on schedule. Should be complete this fall.

  20. Beam Component Testing and Construction Horn 1 Prototype 8x106 Cycles Horn 2 Out Conductor.

  21. CalDet @ CERN T11 Electronics and PMTs Exposed to 1-3.5 GeV tagged electrons/hadrons in T11 beam 60 planes (30X x 30Y) Far Detector electronics used in FY 02 run. Future running with near detector electronics, higher energies.

  22. Low Energy Electron Events Typical 2 GeV Electron Event.

  23. MINOS Response to EM Energy Deposition Signal (MIPs) vs. Beam Momentum s2 vs. 1/Beam Momentum Momentum Momentum Expected resolution, 23%/E constant term <5% Preliminary

  24. Hadronic Events in MINOS(CalDet Data) Sample Pion Events Sample Proton Events Even Plane view Odd Plane view Strip Relative Pulse Height 3.5 GeV 2 GeV 1 GeV

  25. Hadron Energy Distributions Pion MEU distributions Proton MEU Distributions 1 GeV 1.6 GeV 1.6 GeV 1 GeV 2.5 GeV 2 GeV 2 GeV 2.5 GeV 3 GeV 3.5 GeV 3 GeV 3.5 GeV

  26. CalDet Summary • CalDet Preliminary results: • EM resolution 23%, as expected • Analysis of hadrons in progress • Further analysis • Tune MC • Pattern Recognition • More data in 2002-2003 • Higher energies • Different electronics

  27. Far Detector CR Data Running Detector Commissioning and Performance 11% Variation (s) with over 60% of Production Complete <0.2% below 0.5 nominal light yield. Muon Pulse Height Distribution. Average summed signal is ~ 10 pes/MIP. Average 1 MIP signal has been stable to < 0.5% since Feb.

  28. Neutrino Events in the Far Detector Plane transit times determined to ~ 2 ns m 1/beta n Up/down flux ratio ~ 105 Data taken since Feb

  29. 1st Neutrino Event

  30. 2nd Neutrino Event

  31. Conclusion • Excellent progress is being made on all fronts: • Far Detector installation on schedule, now ~ 50% complete • Near Detector plane construction ~ 25% complete • Excavation now complete at FNAL. • Most/all drawing of beam components in hand within 6 months - procurement and fabrication underway. • CalDet and Far Detector data shows that detector performance meets our design specifications. • Far Detector is online NOW as an atmospheric neutrino detector. • On schedule to begin data taking first quarter 2005.

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