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EURO . A High Intensity Neutrino Oscillation Facility in Europe. Introduction Superbeam Neutrino Factory Beta beams Detectors Physics Possible next steps. EUROnu. FP7 Design Study

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slide1
EURO

A High Intensity Neutrino Oscillation Facility in Europe

  • Introduction
  • Superbeam
  • Neutrino Factory
  • Beta beams
  • Detectors
  • Physics
  • Possible next steps
euronu
EUROnu
  • FP7 Design Study
  • Due to limited funds: focus on possible “next” generation neutrino oscillation facilities in Europe
    • CERN to Frejus superbeam
    • Neutrino Factory (in collab. with IDS-NF)
    • Beta beams
  • + performance of baseline detectors and physics reach
  • Output: comparison of physics, “cost” & risk
  • Reported to CERN Council via SG/ECFA
  • Project started: 1st September 2008
  • Duration: 4 years – completion in August 2012
euronu status
EUROnu Status
  • Baselines largely defined
  • Design work still continues
  • Moving more towards “engineering”
  • Costing:
    • WBS being done
    • Framework being created using cost tool
    • Workshop planned soon
  • Safety and risk also to be done
  • Midterm technical review taking place
  • 19 months left!
super beam
Super-Beam
  • Design of CERN to Frejus SB based on SPL
super beam1
Super-Beam
  • Design of CERN to Frejus SB based on SPL
  • Parameters:
    • 4MW beam: HP SPL
    • 5 GeV k.e. protons
    • 130Km baseline
  • Focus on solution for target + collector
  • Determine performance for Physics reach
sb target
SB - Target
  • Preference: static solid target
  • Mercury jet – non-starter:
    • needs magnetic field containment
    • interaction with horn
    • not simple
  • Low Z and 4 targets: small extrapolation
  • Initial thoughts: 4*single graphite/beryllium target
sb target2
SB - Target

Pebble-bed target

sb horn
SB - Horn
  • Baseline:
  • Miniboone shape
  • Aluminium
  • Cooled with internal water jets
  • Pulsed with 300-350kA
  • Looks fine from stress and fatigue
  • Lifetime due to radiation needs study
sb horn1
SB - Horn

Very preliminary

neutrino factory
Neutrino Factory
  • Close collaboration with IDS-NF
  • IDR almost ready

Muon front-end

Muon acceleration

nf front end
NF – Front-end

Status: - advanced - awaiting MICE results - RF studies - alternatives under study

nf acceleration

244 MeV

0.9 GeV

146 m

79 m

0.6 GeV/pass

3.6 GeV

264 m

2 GeV/pass

12.6 GeV

The linac consists of SC RF cavities and iron shielded SC solenoids grouped into three types of cryo-modules.

NF – Acceleration

LINAC

RLA I

RLA II

Chicanes have a vertical dipole spreader, horizontal bending magnets, quadrupoles for transverse focussing and a vertical dipole combiner.

The RLAs consist of single SC RF cavity cells and FODO quadrupole focussing throughout.

nf acceleration1
NF – Acceleration

Non-scaling FFAG:

Conceptual design advanced.

Engineering being started.

But, no such machine ever built.

Commissioning underway.

beta beam
Beta-Beam
  • Main issue in EUROnu: maximise ion production
  • 2 options being considered
bb ion production

EURISOL Beta Beam:18Ne and 6He

BB – Ion production
  • Production
    • ISOL method 18Ne 2x1013/s<8x1011/s6He 2x1013/s>1x1013/s
    • direct production being studied
  • Updated Beta Beam: 8Li and 8B – higher Q isotopes
  • ion production ring

8Li 1014/s

8B >1013/s

bb ion production1
BB – Ion production

But: >5* more ions – difficult to accelerate 8B looks very difficult 18Ne looks possible, though experiment required

bb ion production2
BB – Ion production

New baseline

Work continues to optimise ion production rate

bb ion production3
BB – Ion production

Possible

Needs experiment

Challenging

detectors

Limited funding: only performance and “cost”

  • Concentrate on baseline detectors
    • Magnetised Iron Neutrino Detector - NF
    • Large water cherenkov – SB and BB
    • Near detectors
  • Hoped Laguna would be able to do LAr, e.g., !
Detectors
detectors mind

50-100 m

15 m

n beam

50-100kT

15 m

B=1 T

iron (3 cm)

+ scintillators (2cm)

  • Golden channel signature: “wrong-sign” muons
Detectors - MIND

IDS-NF baseline for 25 GeV NuFact: MIND

  • Far detector: 100 kton at 2000-4000 km
  • Magic detector: 50 kton at 7500 km
  • Appearance of “wrong-sign” muons
  • Segmentation: 3 cm Fe + 2 cm scintillator
  • 1 T magnetic field
detectors mind1

New analysis with Nuance and GEANT4: signal efficiencies

  • Systematic errors: ~1%
  • Background: ~10-4
Detectors - MIND

Numu efficiency

Anti-numu efficiency

detectors wc

MEMPHYS: 3x65mx60m water Cherenkov modules (400 kton fiducial) but could be expanded to 3x65mx80m (572 kton)

  • Either SPL Super Beam or CERN Beta Beam to Frejus tunnel in Modane, France, 130 km from CERN.
  • 81,000 12” PMTs (30% coverage)
Detectors - WC

MEMPHYS

440 kt

65m

60m

EuroNu, RAL,

19 January 2011

detectors wc1

R&D underway: new PMTs and readout electronics

  • Prototype: MEMPHYNO under construction
  • New WC simulation
Detectors - WC

MEMPHYS: interactive μ+500 MeV

physics

Physics performance

  • Optimisation:
    • baselines and energies
    • synergies: experimental setups and facilities
  • Systematics
Physics
next steps
Next Steps
  • Technical review: April/May
  • ECFA Neutrino Panel
    • Independent assessment
    • IDS-NF IDR
    • EUROnu annual report
  • CERN Strategy Review: kick-off this summer report next summer
  • EUROnu contribution under discussion
  • EUROnu future: also under discussion
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