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Highlights of ISS and nufact 1. ISS 2. achieved goals 2.1 investigation of neutrino detectors set of baselines 2.2 study of accelerator -- Neutrino factory -- betabeam -- superbeam 2.3 performance studies -- new elements -- iron calorimenter performance improvement 2.4 matter effects

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Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Highlights of ISS and nufact

1. ISS

2. achieved goals

2.1 investigation of neutrino detectors

set of baselines

2.2 study of accelerator

-- Neutrino factory

-- betabeam

-- superbeam

2.3 performance studies -- new elements

-- iron calorimenter performance improvement

2.4 matter effects

2.5 low energy cross-sections

3. conclusion: towards FP7 design studies

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Physics

compare performance of various options

on equal footing of

parameters and conventions

and agreed standards of

resolutions, simulation etc.

identify tools needed to do so

(e.g. Globes upgraded)

propose « best values » of

baselines, beam energies etc..

Detectors (NEW!)

1. Water Cherenkov (1000kton)

2. Magnetized sampling detector (100kton)

3. Liquid Argon TPC (100 kton)

magnetized Liquid Argon TPC(15kton)

4. Hybrid Emulsion (4 kton)

Near detectors (and instrumentation)

( SB,BBNF )

Yorikiyo Nagashima

Alain Blondel

The ISS:

coordination

Peter Dornan

+

‘wise men’

Ken Peach

Vittorio Palladino(BENE)

Steve Geer

Yoshitaka Kuno

Accelerator:

-- proton driver (energy, time structure and consequences)

-- target and capture (chose target and capture system)

-- phase rotation and cooling

-- acceleration and storage

evaluate economic interplays and risks

include a measure of costing and safety assessment

Michael Zisman

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Collaborators of the scoping study:

-- ECFA/BENE working groups (incl. CERN) (funded by CARE)

-- Japanese Neutrino Factory Collaboration

-- US Neutrino Factory and Muon collider Collaboration

-- UK Neutrino Factory Collaboration (also part of BENE)

-- others (e.g. India INO collaboration, Canada, China, Corea ...)

objectives:

· Evaluate the physics case for a second-generation super-beam, a beta-beam facility and

the Neutrino Factory and to present a critical comparison of their performance;

· Evaluate the various options for the accelerator complex with a view to defining a baseline

set of parameters for the sub-systems that can be taken forward in a subsequent

conceptual-design phase;

· Evaluate the options for the neutrino detection systems with a view to defining a baseline

set of detection systems to be taken forward in a subsequent conceptual-design phase.

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Working groups

Water Cerenkov Detectors

Kenji Kaneyuki, Jean-Eric Campagne

Magnetic Sampling Detectors

Jeff Nelson --> Anselmo Cervera

http://dpnc.unige.ch/users/blondel/detectors/magneticdetector/SMD-web.htm

TASD Malcolm Ellis

Large Magnet Alan Bross

Liquid Argon TPC http://www.hep.yorku.ca/menary/ISS/

Scott Menary, Andreas Badertscher, Claudio Montanari, Guiseppe Battistoni (FLARE/GLACIER/ICARUS’)

Emulsion Detectors http://people.na.infn.it/~pmiglioz/ISS-ECC-G/ISSMainPage.html

Pasquale Migliozzi

Near Detectors http://ppewww.ph.gla.ac.uk/~psoler/ISS/ISS_Near_Detector.html

Paul Soler

Detector Technology associated with detector type

dedicated detector technology session at ISS2 in KEK Jan06.

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

ISS detector mailing list (78)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Executive summary: I. baseline detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Executive summary

II. beyond the baseline,(but should be studied)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Executive summary:

III: near detector, beam instrumentation

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Magnetized Iron calorimeter

(baseline detector, Cervera, Nelson)

B = 1 T F = 15 m, L = 25 m

t(iron) =4cm, t(sc)=1-2cm

Fiducial mass = 100 kT

Charge discrimination down to 1 GeV

200M$

Event rates for 1020 muon decays (<~1 year)

nmsignal (sin2q13=0.01)

nm CC

ne CC

Baseline

732 Km

3.4 x 105

(J-PARC I SK = 40)

108

2 x 108

3 x 105

3500 Km

7.5 x 106

4 x 106

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

New analysis (Cervera)

OLD: Pm> 5 GeV

NEW: Lm > Lhad + 75cm

(shown for three different

purity levels down to << 10-4 )

new analysis

old analysis

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Location of INO

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Ino detector concept

INO Detector Concept

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Upgrade of the proton accelerator complex at CERN

Protons Accelerators for the Future (PAF) WG

Present chain:

weak link in Linac 2

and in the PS

(old!)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Priority is given to LHC but efforts should be made to

incorporate the demands of the High intensity neutrino

programme

the cheapest way to LHC luminosity consolidation is to

-- implement the LINAC 4 and replace the CERN PS

Step I:

replace linac 2 by Linac 4

increase injection rate

no major improvement

for neutrinos

~2011

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Priority is given to LHC and efforts should be made to

incorporate the demands of the High intensity neutrino

programme

the cheapest way to LHC luminosity consolidation is to

-- implement the LINAC 4 and replace the CERN PS

Step II:

new PS2 (5-50 GeV)

PS remains in operation

for injection

at 5 GeV in PS2

possible increase of

SPS intensity --> CNGS

~2015

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Step III:

New SPL (or RCS)

to ~5 GeV

inject directly in PS2

Multi-MW oportunity

@~5 GeV

no date yet

(i.e. a few more years)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

 ephysics at CNGS+?

Basic issues to solve:

1. no near detector --> no knowledge of absolute cross sections

(at osc. max there are no  to normalize…)

difficult to measure absolute rates of  e

and to compare  vs or different energies for CP or matter effect

2. modifications of CNGS beam line are necessary.

possible? perhaps easier to build new dk tunnel

-- with adequate length and near detector.

then why keep the same direction?

3. can SPS and targets really handle 4x more protons?

4. 100 kton Larg or 1Mton water are large investments

-- may be they deserve better!

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

LINAC4--> PS2: an opportunity for MultiMW physics

Eventually the PS should be phased out completely: need for a

machine that bridges 1.4 (booster) to 5 GeV,

or better 0.16 Linac4 to 5 GeV (PS2)

Superconducting Proton Liac or Rapid Cycling Synchrotron

both fast cycling (O(10-50 Hz).

potentially a high power machine serving

-- LHC

-- neutrinos

-- nuclear physics (Eurisol)

for neutrino physics:

conventional p decay superbeam

proton driver for neutrino factory

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

CERN-SPL-based Neutrino SUPERBEAM

300 MeV n m Neutrinos

small contamination from ne (no K at 2 GeV!)

target!

Fréjus underground lab.

A large underground water Cherenkov (400 kton) UNO/HyperK

or/and a large L.Arg detector.

also : proton decay search, supernovae events solar and atmospheric neutrinos. Performance similar to J-PARC II

There is a window of opportunity for digging the cavern starting in 2009 (safety tunnel in Frejus)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Super beams spl frejus

CERN SPL

LSM-Fréjus

Near detector

130km

TRE

Super-beams: SPL-Frejus

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Cern b beam baseline scenario

Nuclear Physics

CERN:b-beam baseline scenario

neutrinos of Emax=~600MeV

SPL

target!

Decay ring

B = 5 T

Lss = 2500 m

SPS

Decay

Ring

ISOL target & Ion source

ECR

Cyclotrons, linac or FFAG

Stacking!

Rapid cycling synchrotron

PS

Same detectors as Superbeam !

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

  • Eurisol baseline Study

  • CERN site (use PS and SPS as are)

  • -- could benefit from PS2

  • Max. ion in CERN SPS is 450 GeV Z/Mion

  • g = 150 for 6He,

  • g = 250 for 18Ne ==> En ~ 600 MeV

    2.9*1018 /yr anti-ne from 6He

    Or 1.1*1018 /yr ne from 18Ne (1017 with avail. tech.)

  • race track (one baseline) or triangle (2 base lines)

  • so far study CERN--> Fréjus (130km)

  • longer baseline ~ 2-300km would be optimal

  • + moderate cost: ion sources, 450 GeV equiv. storage ring (O(0.5M€))

  • + no need for 4MW target

Enmax=2. Q0. ion

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Combination of beta beam with super beam

combines CP and T violation tests

e m (+) (T)me (p+)

(CP)

e m(-) (T)me (p-)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

3s sensitivity to sin22q13

10 year exposure

issues:

-- 18Ne flux?

-- low energy

--> cross-section accuracy?

(assume 2%)

-- energy reconstruction OK

-- near detector concept?

sensitivity sin2213 ~2-5 10-4

combine SPL(3.5 GeV) + bB

==> improves sensitivity by T violation!

J-E. Campagne et al. hep/ph0603172

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Better beta beams:

main weakness of He/He beta-beam is low energy

(450 GeV proton equiv. storage ring produces 600 MeV neutrinos)

Solution 1: Higher g (Hernandez et al)

Use SPS+ (1 TeV) or tevatron ==> reach g= 350 expensive!

Solution 2: use higher Q isotopes (C.Rubbia)

8B --> 8Be e+ne

or

8Li --> 8Be e-anti-ne

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A possible solution to the ion production shortage:

Direct production in a small storage ring,

filled [Gas + RF cavity] for ionization cooling

For 8B or 8Li production,

strip-inject 6Li / 7Li beam,

collide with gas jet (D2 or 3He)

reaction products are

ejected and collected

goal: >~ 1021 ions per year

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Advantages of 8B5+ (ne Q=18MeV )or 8Li3+ (anti-ne Q=16MeV)

vs 18Ne, 6He (Q~=3 MeV)

The storage ring rigidity is considerably lower for a given En

==> for ~1 GeV end point beam

for 8B5+ : 45 GeV proton equiv. storage ring

for 8Li3+:75 GeV proton equiv. storage ring

Two ways to see it:

1. Beta-beams to Fréjus (Emax =600 MeV) could be accelerated

with PS2 into a 50 GeV proton-equivalent storage ring (save €)

2. Beta beams of both polarities up to end-point energy of ~6 GeV

can be produced with the CERN SPS (up to 2000km baseline)

A new flurry of opportunities

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Ec a monochromatic neutrino beam

Electron Capture: N+e- N’+ne

rates are low but very useful for cross-section measurements

Burget et al

EC: A monochromatic neutrino beam

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

NON MAGNETIC

MAGNETIC

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

NEUTRINO FACTORY -- paradoxically quite mature option.

ISS (International Scoping Study) revisited accelerator and

detector options in 2005-2006.

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Overall comparisons from ISS (nearly final plots)

sign Dm213

q13

CP

phase d

NuFACT does it all…

(+ univ. test etc…)

but when can it do it

and at what cost?

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

SYSTEMATICS - related topics

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

NB: 3sigma = 60 means that +-1 sigma = +-3.50

d  [1800-2700 ]

d  [2700-3600 ]

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

  • for NUFACT:

  • work on systematic errors on matter effect

    A preliminary study was made by

    E. Kozlovskaya, J. Peltoniemi, J. Sarkamo,

    The density distribution in the Earth along the CERN-Pyhäsalmi baseline and its effect on neutrino oscillations. CUPP-07/2003

  • the uncertainties on matter

    effects are at the level of a few%

J. Peltoniemi

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

ISS-3 at RAL Warner

Such a study,

in collaboration with geophysicists

will be needed for candidate LBL sites

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

near detector constraints for CP violation

ex. beta-beam or nufact:

P(nenm) - P(nenm)

sind sin (Dm212 L/4E) sin q12 sin q13

= ACP a

sin2q13 + solar term…

P(nenm) + P(nenm)

  • Near detector gives ne diff. cross-section*detection-eff *flux and ibid for bkg

  • BUT: need to know nm and nm diff. cross-section* detection-eff

  • with small (relative) systematic errors.

  • knowledge of cross-sections (relative to each-other) required

  • knowledge of flux!

  • interchange role of ne and nm for superbeam

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

experimental signal= signal cross-section X efficiency of selection + Background

this is not a totally trivial quantity as

there is somethig particular in each of

these cross-sections:

for instance the effects of muon mass

as well as nuclear effects are different for

neutrinos and anti-neutrinos

while e.g. pion threshold is different for

muon and electron neutrinos

need to know this:

and of course the fluxes… but the product flux*ssig is measured in the near detector

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

3.5 GeV SPL

g = 100 b-beam

-- low proton energy:

no Kaons  ne background is low

--region below pion threshold

(low bkg from pions)

but:

low event rate and

uncertainties on cross-sections

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Uncertainties in the double ratio (Sobczyk at RAL meeting)

1. problem comes from compound of

Fermi motion and binding energy

with the muon mass effect.

the double ratio calculation is very insensitive to variations of parameters … but

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

at 250 MeV (first maximum in Frejus expt) prediction varies from 0.88 to 0.94

according to nuclear model used. (= +- 0.03?)

Hope to improve results with e.g. monochromatic k-capture beam

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Conclusions

CERN priority to LHC makes it unlikely to raise a new neutrino

programme until at least 2016. However opportunities are

open by the upgrades of the LHC acclerator complex

-- upgrade of CNGS … tempting and politically attractive.

but is it feasible?

worth it given the time scales?

-- SPL would offer a powerful low energy nm beam

-- beta-beam offers extremely clean ne beam

new ideas to improve flux/energy/cost….

-- baseline detector for sub-GeV neutrinos is WaterCherenkov

-- in few GeV range, Larg, TASD etc… competitive

-- near detector and monitoring systems should not be forgotten

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Conclusions (ctd)

-- neutrino factory still the ultimate contender, especially if q13

is very small. Requires magnetic detectors

-- design studies of Superbeam/betabeams/ NuFact and of

the associated detector systems will be necessary for a choice

around 2010/2012; organization ongoing.

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Regional Oversight Committees

Superbeam study

(or studies)

Accelerator

Detectors

Physics

Nufact study

Accelerator

Detectors

Physics

Betabeam study

Accelerator

Detectors

Physics

Neutrino Oscillation Physics Working Group

-- exact structure of each study to be decided by proponents

-- Regional Oversight Committees will possibly converge to a single international

committee for a future precision neutrino facility

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

FP7 design studies under ESGARD

Design studies : ~2M€ each

mostly calculation or engineering work (personnel)

3 years?

NUFACT+SuperBeam

b-beam

SLHC

SC-SPS

call: february 2007 --> application likely in sept. 1st 2007

funding mid 2008?

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Integrated Activities - IA ~10 M€,

(also called Integrated Infrastructure Initiatives - I3)

Joint Research Activities ,

Network Activities,

Trans-national access

HE-HI

Protons

SC RF

New acceleration

techniques

(sLHC,DLHC)

(ILC)

(CLIC)

M.MW p driver

& muon RLA

(200-800 MHz)

power sources

M-MW p driver

Muon cooling

FFAG

Target &

Collection

Call expected not earlier than April 07

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

to this, a design study of magnetic detectors (neutrino factory)

should be added.

100kton magnetized iron detector

magnetized Liquid Argon,

Fine grain scintillator

or Emulsion detector

+ near detector and instrumentation

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

7.Test Beam Facility for Neutrino Detector R&D

  • Request test beam in East Area at the CERN PS, with a fixed dipole magnet for dedicated Neutrino Detector R&D

Liquid Argon tests, beam telescopes for

silicon pixel and SciFi tests, calorimetry …

Neutrino detector test facility:

community resource for

neutrino detector R&D

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

8. Total Neutrino Detector R&D Programme

Estimated total funds needed to take forward R&D plans

Some fraction of these funds(~30-50%) to be requested from EU

Water Cherenkov R&D in different bid

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Agenda

20 septembre BENE steering group

25 octobre OPEN BENE steering group at CERN

30 October at CERN

meeting of the CARE task force to define JRAs

14 november BENE06

15-17 november CARE06

February 26-28 ISS-IDS meeting @ CERN

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Intensity increase to CNGS?

can one launch an off axis programme similar to

T2K and NUMI-off-axis?

-- present neutrino beam optimized for High energy

(tau appearance) ==> factor >~10 less flux at off axis

energy than T2K

-- no near detector!

A.Rubbia et al, A. Ball et al, have proposed a low energy

version of CNGS with different target and more compact optics,

run off axis (E ~800 MeV for C2GT, 1.5-2 GeV GeV for Larg

A. Ball et al(C2GT) CERN-PH-EP-2006-002

A. Rubbia, P. Sala JHEP 0209 (2002) 004[arXiv:hep-ph/0207084].

A. Meregagliaand A. Rubbiahep-ph/0609106

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

target and horn

C2GT off axis

2d maximum

detector

module

1.5 Mton of water in the Golf of Taranto for 25 1019 pot = 5yrs

--> sensitivity (90%) to sin213= 0.0076

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

hep-ph/0609106

Imagine:

100 kton Larg detector

at 0.750 off-axis 850 km

(1st max) -->  search

or 1.50 off-axis 1050 km 2d max

CP violation and matter effect

or sharing 1st and 2d maximum

assume all of 50 GeV 200 kW PS2 accelerated to 400 GeV

==> CNGS+ = 30 1019 pot/year

5years

5 years

(2026)

<-- sensitivity sin 2213 ~ 10-3

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

thanks to and running, sensitivity to

and matter effects

example (90%)for

‘known hierarchy’

(assume that

hierarchy is given

by comparison

with another expt)

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

Low energy --> low Kaon rate

better controlled ne

contamination

SPL (2.2 GeV) superbeam

20m decay tunnel

single open horn, L Hg target

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


Highlights of iss and nufact 1 iss 2 achieved goals 2 1 investigation of neutrino detectors

2 years n run to 440 ktonFrejus

En~ 260-350 MeV

small cross-sections

Main technical issues

-- 50 Hz horn operation

-- handling of 4 MW in target

and environment.

limited sensitivity

( sin 2213 ~ 210-3)

near detector design?

A. Blondel GDR neutrino 4 0ctobre 2006 Orsay


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