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