Steven ManlySteven ManlyUniversity of University of
RochesterRochesterNuInt ‘02, Irvine, CANuInt ‘02, Irvine, CA15 December 200215 December 2002
Possibilities for an Possibilities for an Off-Axis Near DetectorOff-Axis Near Detector
at NUMIat NUMI
15 December 200215 December 2002 Steven ManlySteven Manly 22
Precision P(e)
Life is not so simple
QE
DIS
15 December 200215 December 2002 Steven ManlySteven Manly 33
15 December 200215 December 2002 Steven ManlySteven Manly 44
Understand neutrino and anti-neutrino cross-sections (both inclusive and exclusive - differential) for E = 1.5-3.0 GeV
Look at nuclear dependence of same
Possibly a useful near experiment for a NUMI far off axis experiment to do oscillations and maybe CP violation
Goals of this experiment
Useful for the JHF, MINOS programs as well! Valuable service for next generation oscillation expts.
Physics is compelling! Gives FNAL relevance in the post-LHC, lingering ILC indecisiveness or German ILC world!
15 December 200215 December 2002 Steven ManlySteven Manly 55
Goals of this experiment
Understand neutrino and anti-neutrino cross-sections (both inclusive and exclusive - differential) for E = 1.5-3.0 GeV
Look at nuclear dependence of same
Possibly a useful near experiment for a NUMI far off axis experiment to do oscillations and maybe CP violation
Physics of this is interesting too!
Quark-hadron duality (Bodek, Jeschonnek, session 3)
measure s (Horowitz, session I)
Compare e and scattering (Wood, session 5)
15 December 200215 December 2002 Steven ManlySteven Manly 66
Physics Goals of Detector Physics Goals of Detector Require…Require…
Identification and separation of Identification and separation of exclusive final statesexclusive final states– Quasi-elastic Quasi-elastic nn––pp, , eennee––pp
– Single Single 00, , ±± final statesfinal states– Muon and electron energy measurementMuon and electron energy measurement
Detection of NC and CC reactionsDetection of NC and CC reactions– NC reconstruction from beam ENC reconstruction from beam E constraint constraint
Different Nuclei in TargetDifferent Nuclei in Target– Nuclear physics and cross-section studies Nuclear physics and cross-section studies
benefitbenefit– Iron, Water, Hydrocarbons all far detector Iron, Water, Hydrocarbons all far detector
candidates candidates
15 December 200215 December 2002 Steven ManlySteven Manly 77
Goals + practicality define experiment
NUMI off-axis beam - (beam exists, can tune energy, energy is appropriate for cross-section studies of interest)
Near detector (high statistics per ton)
Fully active medium (want to see recoil p)
15 December 200215 December 2002 Steven ManlySteven Manly 88
Beam and location
Off-axis beam exploits kinematics of meson decay to produce narrow band beam
Beam spectrum determined by meson count and angle
15 December 200215 December 2002 Steven ManlySteven Manly 99
Off-Axis BeamsOff-Axis Beams Illustration at NUMI Illustration at NUMI
near detector sitenear detector site– Peak energy shifts Peak energy shifts
lowerlower– Width decreasesWidth decreases– High energy tail High energy tail
suppressedsuppressed– Rate significantly Rate significantly
decreaseddecreased
Mimics far detector Mimics far detector flux at some flux at some angle…angle…
On Axis5m
10m
20m
On Axis
5m
10m20m
NUMI Near On and Off-Axis Beams(beam sim. courtesy M. Messier)
NUMI LEConfiguration
NUMI ME
15 December 200215 December 2002 Steven ManlySteven Manly 1010
NUMI vs. other locations/expts
NUMI Near On-AxisNUMI Near On-Axis– Flux comparison (see next slide). Flux comparison (see next slide). – Pros and cons of wideband beam.Pros and cons of wideband beam.– High E tail feed-down into NC.High E tail feed-down into NC.
JHFnuJHFnu– Will run 2008 at earliest. Designed flux Will run 2008 at earliest. Designed flux
is comparable.is comparable.– 280m fine-grained near detector for this 280m fine-grained near detector for this
physics is planned.physics is planned.•Overlap between NUMI and JHF proponents.Overlap between NUMI and JHF proponents.
15 December 200215 December 2002 Steven ManlySteven Manly 1111
Off-Axis vs On-Axis Near Off-Axis vs On-Axis Near FluxFlux
Advantages on-axisAdvantages on-axis – Higher rate. Access Higher rate. Access
to broadband beam.to broadband beam.• Better measurements Better measurements
of CC processesof CC processes
Advantages off-Advantages off-axisaxis– Narrowband beamNarrowband beam
• Reconstruction of NC Reconstruction of NC processesprocesses
– Small corrections to Small corrections to measurement of measurement of backgrounds off-axisbackgrounds off-axis
Far 0.7° OA
OA Near (LE)
Near (LE) Near (ME)
Beam
Far off-axis
Near off-axis
Near on-axis
Unit
ev/kton-yr
ev/kg-yr
ev/kg-yr
(no osc.)
69.5
68.9
34.6
e+e
0.34
0.34
0.57
NC
9.9
11.7
115.5
15 December 200215 December 2002 Steven ManlySteven Manly 1212
Alternate SitesAlternate Sites
K2K “SciBar” K2K “SciBar” DetectorDetector– Similar Similar
detectordetector– Lower rates by Lower rates by
about an order about an order of magnitudeof magnitude
– <E<E>~1.2 GeV>~1.2 GeV
K2K SciBar Event Rates
~20K Events/10 tons fid.(courtesy C. McGrew)
NUMI Near Off-AxisEvent Rates/ton
15 December 200215 December 2002 Steven ManlySteven Manly 1313
BooNEBooNE– Running now! Running now!
– <E<E>~0.9 GeV>~0.9 GeV
– Rates comparableRates comparable– No hallNo hall
CERN to GSCERN to GS– No hallNo hall– high energy beamhigh energy beam
NUMI vs. other locations/expts
15 December 200215 December 2002 Steven ManlySteven Manly 1414
Possible SitesPossible Sites
Possible locations within the NUMI TBM drifts. Possible locations within the NUMI TBM drifts. No new tunneling required…No new tunneling required…– Thanks to Rob Plunkett for navigational assistance!Thanks to Rob Plunkett for navigational assistance!
15 December 200215 December 2002 Steven ManlySteven Manly 1515
Site 1: 5-10 meters Off-AxisSite 1: 5-10 meters Off-Axis
Located in near hall access tunnelLocated in near hall access tunnel– Wide, with personnel access to near hallWide, with personnel access to near hall– Flat floor, easy access to shaftFlat floor, easy access to shaft
•RelativelyRelatively easy to bring utilities to site easy to bring utilities to site
Shaft
Near Hall
Absorber
10m
5m
Ditch
4.5m
6m
15 December 200215 December 2002 Steven ManlySteven Manly 1616
Site 1: 5-10 meters Off-AxisSite 1: 5-10 meters Off-Axis
Can move detector. <ECan move detector. <E>~2-3+ GeV>~2-3+ GeV– 5m gives <E5m gives <E>~2.8 GeV; can go higher but spectrum is broad>~2.8 GeV; can go higher but spectrum is broad
– Ditch at upstream end makes getting 15m off-axis (1.5 GeV) Ditch at upstream end makes getting 15m off-axis (1.5 GeV) more difficultmore difficult
Shaft
Near Hall
Absorber
5 m 10 m
15 December 200215 December 2002 Steven ManlySteven Manly 1717
Site 1: Interaction RatesSite 1: Interaction Rates
Shaft
Near Hall
Absorber
LE+, 10m
ME+, 10m
ME+, 5m
LE+, 5m
15 December 200215 December 2002 Steven ManlySteven Manly 1818
Site 2: 15 meters Off-AxisSite 2: 15 meters Off-Axis
Located just upstream of shaftLocated just upstream of shaft– Wide. Sloped floor (9%). Wide. Sloped floor (9%). – Close to shaft and utility sourceClose to shaft and utility source
– <E<E>~1.5 GeV>~1.5 GeV
Shaft
Near Hall
Absorber
Near (LE)
15 December 200215 December 2002 Steven ManlySteven Manly 1919
Site 2: Interaction RatesSite 2: Interaction Rates
Shaft
Near Hall
Absorber
LE+, 15m
ME+, 15m
15 December 200215 December 2002 Steven ManlySteven Manly 2020
Kinematic region
15 December 200215 December 2002 Steven ManlySteven Manly 2121
Site 3: 5-15 meters Off-AxisSite 3: 5-15 meters Off-Axis
Upstream of absorberUpstream of absorber– Wide, unfinished Wide, unfinished
tunnel. Sloped floor (9% tunnel. Sloped floor (9% grade).grade).
Not an attractive siteNot an attractive site– Far from shaft and Far from shaft and
utility sourceutility source– Interferes with absorber Interferes with absorber
utitilies? Radiation? utitilies? Radiation?
– <E<E>~1.5-3+ GeV>~1.5-3+ GeV
Shaft
Near Hall
Absorber
15m
15 December 200215 December 2002 Steven ManlySteven Manly 2222
Site 3: Interaction RatesSite 3: Interaction Rates
Shaft
Near Hall
Absorber
LE+, 15m
LE+, 13m
ME+, 13m
LE+, 9m
ME+, 9m
ME+, 11m
LE+, 11m
ME+, 15m
15 December 200215 December 2002 Steven ManlySteven Manly 2323
Site SummarySite Summary Appropriate sites exist in the NUMI TBM tunnelsAppropriate sites exist in the NUMI TBM tunnels
– Energy Range <EEnergy Range <E>~1.5-3+ GeV>~1.5-3+ GeV
– Details…Details…•occupancy after NUMI installation (early 05?)occupancy after NUMI installation (early 05?)
•NUMI maintenance, operations conflicts?NUMI maintenance, operations conflicts?
•utilities and outfittingutilities and outfitting
•movable detector to vary angle and therefore movable detector to vary angle and therefore energyenergy
– It appears possible to avoid new excavationIt appears possible to avoid new excavation
15 December 200215 December 2002 Steven ManlySteven Manly 2424
Conceptual NUMI Near Conceptual NUMI Near DetectorDetector
Active/passive
frame around target
Modular designModular design
•Construct above Construct above ground piecewiseground piecewise
•Can add detector or Can add detector or target material as target material as another layeranother layer
Conceptual Conceptual
Active scintillator strip target
Active scintillator strip target
15 December 200215 December 2002 Steven ManlySteven Manly 2525
Conceptual NUMI Near Conceptual NUMI Near DetectorDetectorConceptual Conceptual
Active scintillator strip target
Active scintillator strip target
Fully active
Plastic scintillator (2x2 cm strips)
2 ton fiducial volume
15 December 200215 December 2002 Steven ManlySteven Manly 2626
Conceptual NUMI Near Conceptual NUMI Near DetectorDetectorConceptual Conceptual
Active scintillator strip target
Active scintillator strip target
Several interaction lengths for / separation
Several radiation lengths for photon conversion and electron id
15 December 200215 December 2002 Steven ManlySteven Manly 2727
Conceptual NUMI Near Conceptual NUMI Near DetectorDetectorConceptual Conceptual
Active scintillator strip target
Active scintillator strip target
Investigating the possibility of introducing layers of water-based scintillator with fiber readout
15 December 200215 December 2002 Steven ManlySteven Manly 2828
Conceptual NUMI Near Conceptual NUMI Near DetectorDetectorConceptual Conceptual
Active scintillator strip target
Active scintillator strip target
Can introduce other materials or detectors in layers
15 December 200215 December 2002 Steven ManlySteven Manly 2929
Conceptual NUMI Near Conceptual NUMI Near DetectorDetector
Active scintillator strip target
Active/passive frame around target
Modular designModular design
•Construct above Construct above ground piecewiseground piecewise
•Can add detector or Can add detector or target material as target material as another layeranother layer
Active/passive frame around target
15 December 200215 December 2002 Steven ManlySteven Manly 3030
Conceptual NUMI Near Conceptual NUMI Near DetectorDetector
Active/passive frame around target
Active/passive frame around target
Active/passive frame ~contains the events and can act as a veto
15 December 200215 December 2002 Steven ManlySteven Manly 3131
Conceptual NUMI Near Conceptual NUMI Near DetectorDetector
Active/passive veto in front of target
Adds some material dependence
15 December 200215 December 2002 Steven ManlySteven Manly 3232
Conceptual NUMI Near Conceptual NUMI Near DetectorDetector
Active/passive absorber behind target for /hadron discrimination
plus magnet for charge determination
15 December 200215 December 2002 Steven ManlySteven Manly 3333
Conceptual NUMI Near Conceptual NUMI Near DetectorDetector
Active/passive
frame around target
Modular designModular design
•Construct above Construct above ground piecewiseground piecewise
•Can add detector or Can add detector or target material as target material as another layeranother layer
Active scintillator strip target
Modular designModular design
•Construct above Construct above ground piecewiseground piecewise
•Can add detector or Can add detector or target material as target material as another layeranother layer
15 December 200215 December 2002 Steven ManlySteven Manly 3434
Detector CapabilitiesDetector Capabilities Small fiducial volume OKSmall fiducial volume OK
– 2 tons is sufficient to get 100K events at 2 GeV2 tons is sufficient to get 100K events at 2 GeV Observe recoil protonsObserve recoil protons
– Important for Important for nn––pp, , nn––pp00, etc., etc. 00 , , –– reconstruction reconstruction
– Adds a lot of mass. Muon charge for Adds a lot of mass. Muon charge for bar mode needs bar mode needs power.power.
Embedded Materials and DetectorsEmbedded Materials and Detectors– E.g., RPC layers in plastic. R&D initially, then E.g., RPC layers in plastic. R&D initially, then
backgroundsbackgrounds– Sampling layers of thin material for nuclear targetsSampling layers of thin material for nuclear targets
• Done in past: SOUDAN2, K2K SciFiDone in past: SOUDAN2, K2K SciFi
– Oxygen Rich Targets: HOxygen Rich Targets: H22O-based scint? Acrylic?O-based scint? Acrylic?– Same sites could be used for other detector R&D testsSame sites could be used for other detector R&D tests
15 December 200215 December 2002 Steven ManlySteven Manly 3535
SummarySummary Off-Axis Near Detector forOff-Axis Near Detector for
– Neutrino Cross-section physicsNeutrino Cross-section physics– Neutrino Oscillation “Engineering”Neutrino Oscillation “Engineering”
Narrow band beamNarrow band beam Highly active, modular detectorHighly active, modular detector
– Based on scintillating plastic stripsBased on scintillating plastic strips
Candidate sites exist without new excavationCandidate sites exist without new excavation Significant work needed before proposalSignificant work needed before proposal
– Detector Design, Cost, Site Prep., MINOS Detector Design, Cost, Site Prep., MINOS CohabitationCohabitation
– Demonstration of Cross-Section Measurements under Demonstration of Cross-Section Measurements under real conditions (finite beam width, resolutions, etc.)real conditions (finite beam width, resolutions, etc.)
15 December 200215 December 2002 Steven ManlySteven Manly 3636
15 December 200215 December 2002 Steven ManlySteven Manly 3737
Those Expressing Interest…Those Expressing Interest…
R. Ent, S. WoodR. Ent, S. Wood
Jefferson LabJefferson Lab
E. Christy, C. Keppel, I. NiculescuE. Christy, C. Keppel, I. Niculescu
Hampton University and Jefferson LabHampton University and Jefferson Lab
A. Bodek, H. Budd, P. de Barbaro, G. Ginther, A. Bodek, H. Budd, P. de Barbaro, G. Ginther,
S. Manly, K. McFarlandS. Manly, K. McFarland**, W. Sakumoto, , W. Sakumoto,
P. Slattery, M. ZielinskiP. Slattery, M. Zielinski
University of RochesterUniversity of Rochester**scientific contactscientific contact
15 December 200215 December 2002 Steven ManlySteven Manly 3838
Site 1: 5-10 meters Off-AxisSite 1: 5-10 meters Off-Axis
Simple More simple to move detector. <ESimple More simple to move detector. <E>~2-3+ GeV>~2-3+ GeV– 5m gives <E5m gives <E>~2.8 GeV; can go higher but spectrum is broad>~2.8 GeV; can go higher but spectrum is broad
– Ditch at upstream end makes getting 15m off-axis (1.5 GeV) Ditch at upstream end makes getting 15m off-axis (1.5 GeV) more difficultmore difficult
Shaft
Near Hall
Absorber
Far 0.7° OA
Near (LE)10m
Far 0.7° OA
Near (LE)5m
Top Related