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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.