Download - NUMI/MINOS Status
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NUMI/MINOSStatus
•J. Musser for the MINOS Collatoration
•2002 FNAL Users Meeting
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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!
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SuperK Status (Neutrino 02)
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SuperKDetection
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Component Mixing
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K2K Allowed Region
Far Detector eventsample: 56 FC events
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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.
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CC Energy Distribution Channel
Note: 10 kt. Yr. = ~ 2 live years of running. Results stillstatistics limited at that time.
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CC Energy Distribution -Based Limits and Confidence Regions
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e Mixing
MINOS will probe U13 in critical SuperK allowed region.Off-axis measurements facilitate studies of this channel.
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Near Detector: 980 tons
Far Detector: 5400 tons
Det. 2
Det. 1
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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
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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
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MINOS Active Detector
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FarDet Plane Installation
Plane view, looking South
Top view, showing fiber readout cables
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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.
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Near Detector Construction
Assembly Area in New Muon Lab
Scint. Modules Installed onNear Detector Plane.
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NUMI Tunnel and Hall Construction
Carrier Tunnel
(10’ x 10’)Target Hall
(25’W x 30-60’H x 175’L)
Decay Tunnel
(21’6”D + 4’walkway) Beam Absorber
Muon Detectors
MINOSService Bldg .
MINOS Hall
(35’W x 32’H x 150’L)
MINOS Near Detector
MINOS Hall Tunnel
Excavated
600ft 225ft 2,193ft1,250ft
Extraction Hall
Target Service
EAV-2&3EAV-1EAV-4
Target ServiceMINOS Service Bldg
Beam Absorber Access Tunnel
Target Shaft Area MINOS Shaft Area
Decay pipe (546 ft of 2193ft)Bulkheads
MINOS Sump
Excavation Complete! Decay Pipe now being laid in.
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Tunnel Construction
Decay walkway forms on the right (5/2/02)
Work is proceeding on schedule.Should be complete this fall.
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Beam Component Testing and Construction
Horn 1 Prototype8x106 Cycles
Horn 2 Out Conductor.
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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.
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Low Energy Electron Events
Typical 2 GeV Electron Event.
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MINOS Response to EM Energy Deposition
Signal (MIPs) vs. Beam Momentum 2 vs. 1/Beam Momentum
MomentumMomentum
Expected resolution, 23%/E constant term <5%
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Hadronic Events in MINOS(CalDet Data)
Sample Pion Events
Str
ip
Even Plane view Odd Plane view
Relative P
ulse Height
Sample Proton Events
2 GeV
3.5 GeV
1 GeV
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Hadron Energy Distributions
Pion MEU distributions Proton MEU Distributions
1 GeV 1.6 GeV
2 GeV 2.5 GeV
3 GeV 3.5 GeV
1 GeV 1.6 GeV
2 GeV 2.5 GeV
3 GeV 3.5 GeV
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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
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Far Detector CR Data Running
Detector Commissioning and Performance
11% Variation () with over 60% of Production Complete
<0.2% below 0.5 nominal lightyield.
Muon Pulse Height Distribution.Average summed signal is ~ 10 pes/MIP.
Average 1 MIP signal has been stable to < 0.5% since Feb.
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Neutrino Events in the Far Detector
1/beta
Up/down flux ratio ~ 105
Data taken since Feb
Plane transit times determined to ~ 2 ns
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1st Neutrino Event
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2nd Neutrino Event
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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.