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Harvard Neutrino Group
DoE Review
August 21, 2006
DoE Review August 21, 2006 Gary Feldman
Introduction
The Harvard Neutrino Group is engaged in three highly related experiments
MINOS: 5 kT, magnetized iron-scintillator detector, optimized for observing oscillations
MIPP: A fixed-target particle production experiment whose results will improve the near-far detector comparisons in MINOS
NOA: A proposed follow-on experiment to MINOS, off-axis 20-25 kT totally-active liquid scintillator detector, optimized for observing e oscillations
DoE Review August 21, 2006 Gary Feldman
Harvard Neutrino Group
Faculty: GF Engineers: John Oliver, Nathan Felt Postdoc: Mayly Sanchez Graduate Students: Joshua Boehm, Andre
Lebedev, Sharon Seun, Steve Cavanaugh*
DoE Review August 21, 2006 Gary Feldman
MINOS Layout(Main Injector Neutrino Oscillation Search)
DoE Review August 21, 2006 Gary Feldman
MINOS Far Detector
Half of MINOSfar detector
8m octagonal tracking calorimeter
486 layers of 1 in iron plates 4.1 cm-wide scintillator strips
with WLS fiber readout, readout from both ends
8 fibers summed on eachPMT pixel
25,800 m2 (6.4 acres) of active detector planes
Toroidal magnetic field<B> = 1.3 T
Total mass 5.4 kT
DoE Review August 21, 2006 Gary Feldman
MINOS Detectors
Far Detector
Near Detector
DoE Review August 21, 2006 Gary Feldman
Harvard Contributions to MINOS
Far detector front-end electronics Contributions to the C++ framework and the
development of the “Standard Reconstruction.” Production processing on the Fermilab computer
farm and data quality validation Development of offline analysis for e
oscillations MINOS positions
GF: Executive Committee Mayly SanchezFarm Batch Processing Group
coordinator, Validation and Monitoring Group convener, and e Working Group Co-convener:
DoE Review August 21, 2006 Gary Feldman
MIPP ExperimentMain Injector Particle Production Experiment
DoE Review August 21, 2006 Gary Feldman
Why do the MIPP Experiment?
Our main interest is to reduce the uncertainty in the near-far ratio for MINOS and other oscillation experiments.
Not the same due to the line source of neutrinos.
TargetNearFar
DoE Review August 21, 2006 Gary Feldman
Far to Near Ratio
DoE Review August 21, 2006 Gary Feldman
MIPP Measurements
Unlike previous measurements, MIPP has a full acceptance. It will produce a library of produced particles.
We have taken 1.9M events with 120 GeV protons on the MINOS target.
We have also taken 20, 58, and 120 GeV secondaries on thin carbon targets and will use them to “reconstruct the MINOS (or any other carbon target).
Expect first results by the end of 2006.
DoE Review August 21, 2006 Gary Feldman
Harvard Contributions to MIPP
RICH detector hardware and software. Data acquisition. Trigger Beamline improvements General reconstruction and Monte Carlo
programs. MIPP Positions:
GF: Chair of the MIPP Institutional Board
DoE Review August 21, 2006 Gary Feldman
What is NOA?
NOA is an approved Fermilab experiment 20-25 kT totally-active liquid scintillator detector Situated 12 km off the NuMI beamline 810 km from
Fermilab (in a narrow band neutrino beam around the first oscillation maximum)
Designed to be sensitive to e oscillations, needed for
• sin2(213) • Mass ordering • CP violating phase
DoE Review August 21, 2006 Gary Feldman
Off-Axis Rationale
Both Phase 2 experiments, NOA and T2K are sited off the neutrino beam axis. This yields a narrow band beam:
More flux and less background (e’s from K decay and higher-energy NC events)
€
E =0.43 γmπ
1+γ2 2
DoE Review August 21, 2006 Gary Feldman
NOA Far Detector
“Totally Active”20 kT: 16 kT liquid scintillator 4 kT PVC32 cells/extrusion12 extrusions/plane1302 planes Cell dimensions: 3.9 cm x 6 cm x 15.7m (0.15 X0 thickness)Extrusion walls: 3-4 mm outer 2-3 mm innerU-shaped 0.8 mm WLS fiber into APD
89 m
15.7m
15.7m
31-planeblock
Admirer
QuickTime™ and aTIFF (LZW) decompressorare needed to see this picture.
DoE Review August 21, 2006 Gary Feldman
1.65 GeV eN epπ0
DoE Review August 21, 2006 Gary Feldman
Harvard Contributions to NOA
Collaboration management (GF co-spokesperson) Building the physics case for NOA NOA electronics and DAQ (John Oliver project
electronics engineer )
DoE Review August 21, 2006 Gary Feldman
What We Know and What We Don’t Know
O. Mena and S. Parke, hep-ph/0312131
DoE Review August 21, 2006 Gary Feldman
3 Sensitivity to 13 0
DoE Review August 21, 2006 Gary Feldman
Parameters Consistent witha 2% e Oscillation
DoE Review August 21, 2006 Gary Feldman
95% CL Resolution of the Mass Ordering
DoE Review August 21, 2006 Gary Feldman
1 and 2 Contours for Starred Point: sin2(213) = 0.02
DoE Review August 21, 2006 Gary Feldman
Talks
Overview GF 25 min MINOS e Josh Boehm 20 min
MIPP Andre Lebedev 20 min NOA electronics John Oliver 15 min
and DAQ