the no n a experiment status
DESCRIPTION
The NO n A Experiment Status. Leon Mualem California Institute of Technology (for the NO n A collaboration) Workshop on Next Generation Neutrino and Nucleon Detectors 2007 Hamamatsu, Japan. The NO n A Experiment. Uses a 15kT detector, NO n A Positioned off axis of the Fermilab NuMI beam - PowerPoint PPT PresentationTRANSCRIPT
Leon Mualem — NNN07
The NOA Experiment Status
Leon MualemCalifornia Institute of Technology
(for the NOA collaboration)
Workshop on Next Generation Neutrino and Nucleon Detectors 2007
Hamamatsu, Japan
Leon Mualem — NNN07
The NOA Experiment
• Uses a 15kT detector, NOA
• Positioned off axis of the Fermilab NuMI beam
• Run for 6 years
• Goals:– Observation of the transition e
– Measurement of 13 to factor of ~2
– Measurement of sin2(223)
– Determination of mass hierarchy (sign of m223)
The NOvA Collaboration
25 Institutions, 129 Physicists and EngineersArgonne, Athens, Caltech, College de France, Fermilab, Harvard, Indiana, ITEP-
Moscow, Michigan State, Minnesota, Minnesota-Duluth, Munich, Northern Illinois, Ohio State, Rio de Janeiro, South Carolina, Southern Methodist University, Stanford,
Stonybrook, Texas, Texas A&M, Tufts, UCLA, Virginia, William and Mary
Leon Mualem — NNN07
Approximate Schedule• Apr 2006: US DOE CD-1 review. Recommends approval• Sep 2007: Cooperative Agreement signed• Oct 2007: US DOE CD-2/3A review
– Baseline, advanced procurement• Nov 2008: Prototype Near detector ready• Mar 2010: Beneficial Occupancy of the FD building
– Outfitting and installation begins• Oct 2010: 9 month shutdown for accelerator upgrades• Jun 2011: First Superblock Ready (~2.5kT)• Aug 2011: 400kW beam commissioning• April 2012-Jul 2012: Shutdown for upgrades to 700kW
beam commissioning• Dec 2012: Far Detector completed
Leon Mualem — NNN07
Leon Mualem — ICHEP06
Fermilab NuMI Beam
Leon Mualem — NNN07
Off-Axis beam features
• Narrow energy distribution
• Tuned Energy by selecting off-axis angle– Maximize νe
appearance– Minimize νμ
• Higher Intensity at a given energy
• Suppressed high energy tail– Reduces NC
contamination
—NUMI-On-axis beam—14mrad off-axis beam
(no oscillation)
Proton Plans and Possibilities
Leon Mualem — NNN07
Project X
2300
Leon Mualem — NNN07
Site for Far Detector: Ash River, MN
• This site is at 810 km from Fermilab, 11.77 km off-axis• Farthest available site in the U.S. along the NuMI beam
– US 53, St. Louis County Road 129 - all weather access
Ash River
Minneapolis
Duluth
International Falls
Fermilab
Ash River
Minneapolis
Duluth
International Falls
Fermilab
Ash River
VoyageursNational Park(shaded brown)
Ash River
VoyageursNational Park(shaded brown)
15.4m
15.4m
70m
Leon Mualem — NNN07
NOA Far Detector
15 ktons
15.4m x 15.4m x 70m
1003 liquid scintillator planes, (~80% active)
Scintillator cells 3.8 x 6.0 x 1540 cms
Read out from one side per plane with APDs
Expected average signal at far end of 30pe
Leon Mualem — NNN07
The Basic Detector element• Liquid Scintillator
• 5.5% pseudocumene as scintillant• Mineral oil and waveshifters (PPO, bis-MSB)
• PVC cell for primary containment• Horizontals:3.87 cm x 6.0 cm x 15.4 m long• Verticals: 3.76 cm x 5.7 cm x 15.4 m long• Highly reflective, 15% titanium dioxide
• Looped wavelength shifting fiber to collect light• 0.7 mm diameter, double clad, K27 waveshifter• Almost perfect mirror, 3.6*light in 1 fiber
• Avalanche Photodiode • 85% quantum efficiency• Gain of 100, operate at -15oC
• Low noise amplifier
To 1 APD pixel
W D
typicalchargedparticle
path
L
To 1 APD pixel
W D
typicalchargedparticle
path
L
Technical Progress
IPND extrusions at manufacturer
• Things are happening
• Prototype Extrusions have been made
• Prototype Photodetectors and readout electronics delivered
Leon Mualem — NNN07
APD Photodetector
• Hamamatsu Si Avalanche Photodiode (APD)– Variant of commercial
S8550 SiAPD– Custom design to
match to fiber aspect ratio
– Bare die mounted to PCB via gold bump thermo-compression
Leon Mualem — NNN07
APD Advantage
Wavelength (nm)
85% QEMatches fiber Emission
Leon Mualem — NNN07
Front End Board
• Low-Noise ASIC
• External ADC (AD41240)
• FPGA, control and DSP
ASIC ADC FPGA
Leon Mualem — NNN07
Leon Mualem — NNN07
e CC event
epe-p+
E=2.5GeV
Ee=1.9GeV
Ep=1.1GeV
E=0.2GeV
Leon Mualem — NNN07
CC event
• 2GeV muon CC event
Leon Mualem — NNN07
CC event
n-n+o
E=2.8 GeV
E=0.5GeV
En=1.0GeV
E+=0.4GeV
Eo =1.8GeV
Leon Mualem — NNN07
NC event
Npo
E=10.6 GeV
Ep=1.04GeV
Eo =1.97GeV
Current Analysis Results• Completely new analysis written in new framework
(transition from Fortran to C++)• New reconstruction algorithms • New event selection algorithms• New analysis at least as powerful as previous.
• Increases e selection efficiency
• New simulation codes – Upgrades to neutrino interaction code– Upgrades to flux model– increases background (may overestimate)
Leon Mualem — NNN07
Electron Identification for NOvA
~20 variables in Neural Net
Example distributions
Overall efficiency ~30% (optimizable)
ANN Output
signal
signal
signal
bkg.
NC
NC
CC
CC
CC
beam e
Leon Mualem — NNN07
Detector Performance
• Optimize Figure of Merit (FOM=sig/√bkd) performance separately for and anti-
• Use 18E20 POT, sin2(213) =0.1, m2=2.4E-3, no matter effects
• Upgrades to neutrino event generator
• Updates to predicted neutrino flux
• Updated detector mass and configuration– 15kT, slightly shorter modules, photodetector readout
Leon Mualem — NNN07
Performance optimization
Leon Mualem — NNN07
Neutrino Figure of merit (sig/√bkd)Maximized at 15.3, and26% selection efficiency
Anti-Neutrino Figure of merit (sig/√bkd)Maximized at 9.5, and20% selection efficiency
Combined Figure of merit 18.0
3 Sensitivity to sin2(213) ≠ 0
Sensitivity vs for non-zero sin2(213) at 700kW, 1.2MW, and 2.3MW
Leon Mualem — NNN07
Leon Mualem — NNN07
Mass Hierarchy Resolution
If you assume a measurement of P(νe)=0.02, what does that imply about θ13 and the mass hierarchy, and how can you distinguish them.
Determine P using anti-neutrinos and/or measure θ13 in reactor experiment.
95% CL Sensitivity tothe Mass Ordering
Inverted
Normal
Leon Mualem — NNN07
Leon Mualem — NNN07
Measurement of sin2(223)
If sin2(223) = 1, then it can be measured to 0.004.
Otherwise, it can be measured to~0.02.
Summary
• Progress in many areas– Reviews and administrative milestones and
achievements– Technical – production of prototype detectors– Analysis
• Development of new reconstruction
• Development of new event selection
• More improvements possible; this area is under active development
Leon Mualem — NNN07
Conclusions
• The NOA experiment exhibits significant sensitivity to the current and future issues of neutrino oscillations– Electron neutrino appearance -- sin2(213)
– Muon neutrino disappearance -- sin2(223)
– mass hierarchy resolution– CP violation measurement
• Upgraded beam intensity needed to reach all of these goals
• Final thanks to NOA Collaborators for their contributions
Leon Mualem — NNN07