1. J. Musser for the MINOS Collatoration 2002 FNAL Users Meeting
NUMI/MINOS Status
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 nt Detection

5. 3 Component Mixing

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

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
Target Service
Service
Bldg .
EAV-1
EAV-2&3
EAV-4
Extraction Hall
Decay Tunnel
MINOS Sump
(21’6”D + 4’walkway)
Beam Absorber
MINOS Hall Tunnel
Carrier Tunnel
(10’ x 10’)
Muon
Detectors
MINOS Hall
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 Work is proceeding on schedule.
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 2 Out Conductor.
Horn 1 Prototype
8x106 Cycles

21. CERN
T11
Electronics and PMTs
Exposed to 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 GeV
1.6 GeV
2 GeV
2.5 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
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.