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

NUMI 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!

NUMI SuperK Status (Neutrino 02)

NUMI SuperK    Detection

NUMI  Component Mixing

NUMI K2K Allowed Region Far Detector event sample: 56 FC events

NUMI 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.

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

NUMI CC Energy Distribution -Based Limits and Confidence Regions

NUMI   e Mixing MINOS will probe U 13 in critical SuperK allowed region. Off-axis measurements facilitate studies of this channel.

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

NUMI 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

NUMI 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

NUMI MINOS Active Detector

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

NUMI 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.

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

NUMI 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 MuonDetectors MINOS ServiceBldg. MINOS Hall (35’W x 32’H x 150’L) MINOS Near Detector MINOS Hall Tunnel Excavated 600ft 225ft2,193ft 1,250ft Extraction Hall Target Service EAV-2&3 EAV-1 EAV-4 Target Service MINOS 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.

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

NUMI Beam Component Testing and Construction Horn 1 Prototype 8x10 6 Cycles Horn 2 Out Conductor.

NUMI 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.

NUMI Low Energy Electron Events Typical 2 GeV Electron Event.

NUMI MINOS Response to EM Energy Deposition Signal (MIPs) vs. Beam Momentum  2 vs. 1/Beam Momentum Momentum Expected resolution, 23%/  E constant term <5%

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

NUMI Hadron Energy Distributions Pion MEU distributions Proton MEU Distributions 1 GeV1.6 GeV 2 GeV 2.5 GeV 3 GeV3.5 GeV 1 GeV 1.6 GeV 2 GeV2.5 GeV 3 GeV 3.5 GeV

NUMI 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

NUMI Far Detector CR Data Running Detector Commissioning and Performance 11% Variation (  ) 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.

NUMI Neutrino Events in the Far Detector 1/beta Up/down flux ratio ~ 10 5 Data taken since Feb Plane transit times determined to ~ 2 ns 

NUMI 1st Neutrino Event

NUMI 2nd Neutrino Event

NUMI 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.