NuMI NuMI Overview NuMI Overview: NBI 2003 N. Grossman (FNAL) Physics On and Off Axis Page 1 • NuMI Construction & Installation Status • MINOS Near & Far Detector Status • MIPP • NuMI Beam Options � Moving target � ν -bar � Off-Axis Beam Possibilities • Summary
NuMI NuMI Overview Neutrino Oscillations: NBI 2003 N. Grossman (FNAL) What we know now Page 2 Muon neutrinos disappear at ∆ m 2 of few 10 -3 eV 2 (SuperK, K2K,Soudan II, Macro) Electron neutrinos disappear at ∆ m 2 of several 10 -5 eV 2 (Homestake, SAGE, GNO, SuperK, SNO) Electron antineutrinos also disappear , more likely at several 10 -5 eV 2 (KamLand) Electron neutrinos convert into other active neutrinos (SNO) • Neutrinos have non-zero mass (*****) • Weak eigenstates are mixtures of mass eigenstates (****) ν 3 ν * * * U U U ν e 1 2 3 1 e e e = ν ν ν ν ∆ m 2 * * * U U U ν µ ν τ µ τ µ µ µ atm 1 2 3 2 e ν * * * U U U τ τ τ 1 2 3 3 ν 2 ν 1 • Magnitude of mixing matrix elements defines ∆ m 2 composition of electron/muon/tau neutrinos sun • Squared mass differences determine the oscillation length
NuMI NuMI Overview ν µ Disappearance at MINOS NBI 2003 N. Grossman (FNAL) Page 3 Comparison of the observed spectrum of ν µ charged current events with the expected one provides a direct measure of the survival probability as a function of neutrino energy ∆ 2 Does the disappearance follow this 1.27 m L = − ϑ 2 2 1 si n 2 si n P functional form? 2 3 E ν Neutrinos and antineutrinos? Dip depth �� oscillation amplitude (sin 2 2 θ 23 ) • Shape of disappearance probability �� ∆ m 2 23 ( π /2 = 1.27x ∆ m 2 • 23 xL/E dip )
NuMI NuMI Overview NBI 2003 MINOS Physics N. Grossman (FNAL) Page 4 • Demonstrate oscillatory behavior « Precise measurement of CC energy distribution between near & far detectors (2-4% sys. uncertainty in E ν per GeV bin) « “Standard” or non-standard oscillations? • Precise measurement of oscillation parameters « ∆ m 2 23 at ~ 10% « How close to 1.0 is sin 2 2 θ 23 ? (Can test to ~5% level) * Are we looking at a new fundamental symmetry? • Improved determination of flavor participation « # of CC ν µ events far/near (for ν µ -> ν x at about ~2% ) « # of CC ν e events far/near (for ν µ -> ν e down to about 2% ) « # of NC events far/near (for ν µ -> ν s down to about 10%) • Direct measurement of atmospheric ν µ vs ν µ disappearance « CPT Violation
NuMI NuMI Overview NBI 2003 NuMI Beam N. Grossman (FNAL) Page 5 1270 events/kt-yr 2740 events/kt-yr • 120 GeV Protons from Fermilab Main Injector 10 µ s pulse, every 1.9s • • Proton Intensity: « 4x10 13 protons/pulse design « 2.5x10 13 p/p expected at startup • Hadrons focused with 2 horns « Select beam energy spectrum by adjusting relative horn and target positions 1040 m 470 events/kt-yr ν Rock: 240m, Main Injector 103 m Target, muon monitors Horns Not to scale Decay pipe: Hadron Absorber: 678m x 1m radius Near Detector 4.7 m Al/Fe
NuMI NuMI Overview NBI 2003 NuMI Beamline Overview N. Grossman (FNAL) Page 6 MINOS Surface Building Target Surface Building
NuMI NuMI Overview NBI 2003 MINOS Experiment N. Grossman (FNAL) Page 7 Construct Facilities and Equipment for a Two Detector Neutrino Oscillation Experiment with Variable Energy Neutrino Beam (Start 2005) Obtain firm evidence for oscillations and measure oscillation parameters, ∆ m 2 , sin 2 2 θ. Probe for ν µ →ν e appearance. Far Detector: 5400 tons Near Detector: 980 tons Det. 2 Det. 1
NuMI NuMI Overview NBI 2003 NuMI Project Status N. Grossman (FNAL) Page 8 NuMI Beam( Beam commissioning planned for January 2005) : • Design status -> “complete”, Beamline ~70% complete overall for all systems • Testing done on: horns, remote clamp, transmission line, horn power supply • Prototype piles/stacking of: T-blocks, target pile, hot cell • Accelerator and extraction beam studies for NuMI, proton intensity working group • Beam commissioning planned for January 2005 Near Detector • Near Detector planes surface assembly complete • DAQ racks being assembled • Installation starts Feb. 2004 • Calibration Detector run complete at CERN PS « EM & Hadron response & event topology « Near/Far readout comparison Far Detector – Finished August 2003!!! • Taking atmospheric neutrino data as we speak
NuMI Adding a new Beamline to NuMI Overview NBI 2003 N. Grossman (FNAL) Fermilab Page 9 MI ring on bottom, Recycler on top, NuMI in the middle (fit between two accelerators) NuMI Stub and beyond… From Main Injector to Extraction to Stub to Target
NuMI NuMI Primary Beam Installation: NuMI Overview NBI 2003 N. Grossman (FNAL) Upstream Extraction Region Page 10 Lambertsons being baked out MI ring on bottom, Recycler on top, NuMI in the middle (fit between two accelerators) Extraction region
NuMI NuMI Primary Beam Installation: NuMI Overview NBI 2003 N. Grossman (FNAL) Downstream Region Page 11 From NuMI Stub… ..to Peter’s Porch to carrier tunnel (lined section)
NuMI NuMI Primary Beam: NuMI Overview NBI 2003 N. Grossman (FNAL) Pre Target Hall Region Page 12 Downstream end of carrier tunnel, at Pre Target at Beneficial Occupancy Beneficial Occupancy (installation of magnets/instrumentation underway now in both these places)
NuMI NuMI Overview NuMI Project: NBI 2003 N. Grossman (FNAL) Target Hall & Support Rooms Page 13 • Horn Power Supply Room, penetration for transmission line to Target Hall horns • Installation of rails in the Target Hall pit • Radioactive Water Room (RAW) and piping through penetration to Target Hall
NuMI Neutrino Beam Production Devices NuMI Overview NBI 2003 N. Grossman (FNAL) and Target Pile Page 14 Alternate Horn Positions Beamline Component Positioning Modules Two Types of Magnetic Focusing Horns Pion Production Target (plus readout of target, vacuum pump) Baffle to protect horn from beam accidents Target Hall Radiation Shielding Hot (Radioactive) Component Workcell and Hot Handling Procedures/Tooling Shield Pile Recirculating Air Cooling System
NuMI NuMI Overview Target Hall in pictures NBI 2003 N. Grossman (FNAL) Page 15 (plus recirculating air cooling, target, hot work cell, etc) 1 of three 27 ton support modules (10% of ) Shielding Blocks Target with motion system Horn 1, stripline, clamp
NuMI NuMI Overview NBI 2003 Neutrino Beam Devices N. Grossman (FNAL) Page 16 Target from IHEP Horn 2 Part of NuMI shielding for Target Pile and Hadron Absorber
NuMI NuMI Overview NuMI Secondary Beam : NBI 2003 N. Grossman (FNAL) Decay Region Then & Now Page 17 • Decay tunnel before shielding pour: 11/22/02 • Decay tunnel now (concrete shielding, electrical, fire): 10/20/03 675m long, 2m diameter
NuMI NuMI Overview NBI 2003 Hadron Absorber N. Grossman (FNAL) Page 18 Aluminum Steel Water cooling lines Absorber Cavern / Shield Absorber Core Presentation 15 March - J. Hylen
NuMI NuMI Overview NBI 2003 Decay Region & Hadron Absorber N. Grossman (FNAL) Page 19 • Decay region power deposition « 63 kW in 1 cm thick steel decay pipe « 52 kW in shielding concrete « Peak deposition in the steel is ~360 W/m (~ 50 m from target hall) « Drops to 20 W/m (at ~610 m) « Heat is removed by twelve copper water-cooling pipes, limiting decay pipe temperature to ~ 50 deg C • Absorber core « 8 modules of aluminum with dual water-cooling paths * 30.5 x 129.5 x 129.5 cm 3 each * 8 kW peak power in one module (normal beam conditions) « Followed by 10 plates of steel, each 23.2 cm thick. • Total power in Absorber region: 60 kW (nearly entire 400 kW beam power in accident condition)
NuMI NuMI Overview NBI 2003 MINOS HALL: Then and Now N. Grossman (FNAL) Page 20 • MINOS Hall as delivered by S. A. Healy (drip ceiling over the detector): 11/22/02 • MINOS Hall now: 10/30/03 « Steel near detector support structure « Crane installed • Beneficial Occupancy of MINOS Hall: 1/31/04
NuMI NuMI Overview NBI 2003 MINOS Near Detector N. Grossman (FNAL) Page 21 • 3.8 x 4.8m “octagonal” steel & scintillator tracking calorimeter • Same basic construction, sampling and response as the far detector. • No multiplexing in the main part of the detector due to small size and high rates. « Hamamatsu M64 PMT « Faster Electronics (QIE) • 282 planes of steel • 153 planes of scintillator
NuMI NuMI Overview Near Detector Construction/Assembly NBI 2003 N. Grossman (FNAL) at New Muon Lab Page 22 Construction underway in New Muon Hall
NuMI NuMI Overview Far Detector Cavern Layout, Soudan NBI 2003 N. Grossman (FNAL) Underground Laboratory Page 23 ν beam s e l u d o m r e p u S Workstations Area reserved MINOS Cavern for emulsion Monorail detector Shaft Soudan 2 Cavern
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