IDM2004 G. Gerbier

LSM - Fréjus underground sitesstatus and projects

Gilles Gerbier

CEA/Saclay - LSM

IDM2004 G. Gerbier

FréjusFréjus

ModaneModane

Entrance of road tunnelEntrance of road tunnel

COMMISSARIAT À L’ÉNERGIE ATOMIQUE

IDM2004 G. Gerbier

FRANCE ITALIE

AltitudesDistances

1228 m 1298 m1263 m0 m 6210 m 12 868 m

TorinoChambéry

IDM2004 G. Gerbier

The lab now (2004)

- 1 .6 10-6 fast neutrons/cm2/s from rock/concrete radioactivity- air continuously renewed : 2 vol/hour- very low Rn concentration 5-10 Bq/ m3

- 1 .6 10-6 fast neutrons/cm2/s from rock/concrete radioactivity- air continuously renewed : 2 vol/hour- very low Rn concentration 5-10 Bq/ m3

- 1750 rock thickness- 4800 mwe- 4 muons /m2/ day

- 1750 rock thickness- 4800 mwe- 4 muons /m2/ day

IDM2004 G. Gerbier

• Upgrade of cooling unit for the lab : from 60 kW to 230 kW cooling power-end 2004– Use air from tunnel as « cold source »

• Radon free air installation (0.2 Bq/m3)– October 2004

• Edelweiss II installation– October 2004 - june 2005

Near future

IDM2004 G. Gerbier

Edelweiss II - how to install a 100 T set up of 5 * 3 m * 3m +

services in this free space ?

IDM2004 G. Gerbier

Future plans

New safety gallery Start 2005

New Lab ?? Project

IDM2004 G. Gerbier

Le salon de la nouveauté et des savoir-faire le 12 et 13 Octobre 2002 . LSM.

ITALIE

FRANCE

Actual laboratory

3500 m3

Large laboratory

1 000 000 m3

Routier

Galerie de

secours

DETECTEURS

CHERENKOV

Artist view Ph C

Neutrino properties, proton decay, supernovae…

Towards a Large International Underground Laboratory

IDM2004 G. Gerbier

How to measure 13 and

Study e oscillations at first maximum

L= 500 km/GeV x E

with E = 260 MeV (see later CERN beams) then L= 130 km

compare amplitudes for neutrinos and antineutrinos = A2 + S2 + 2AS sin

= A2 + S2 - 2AS sin

atm) = 21/2 13

S (sun) ~ 0.04 for LMA

but need high intensity beam ie MW proton beam…

)( eP

)( eP

IDM2004 G. Gerbier

Genève

Grenoble

Chambéry

Annecy

Modane

Albertville

A6

Turin

St Jean de Maurienne

Valence

A43

LYON

C.E.R.N

Massif du Jura

C.E.R.N

Lac Léman

Lac d’Annecy

Lac du bourget

Massif du Fréjus

FROM CERN TO Fréjus : 131 km for neutrinos 164 km for cars

130 Km

Sending neutrinos from CERN to Sending neutrinos from CERN to Fréjus…Fréjus…

IDM2004 G. Gerbier

SPL beam produces « super beam »

= low energy 260 MeV neutrino beam

CERN working groups results

IDM2004 G. Gerbier

NewLINAC

An ideal complementary e beam : the « beta beam »

Concept proposed by Piero Zucchelli at CERN•Produce radioactive ions (ISOL technique), 6He and 18Ne•Accelerate them in the CERN accelerator complex up to of order 100, to produce 0.3 GeV neutrinos•Store ions in a storage ring with long straight sections aimed at a far detectorAdvantages :•strongly focussed neutrino beam due to small Q value of beta decays•very pure flavour composition ( contamination ~ 10 -4 )•perfectly known energy spectrum http://beta-beam.web.cern.ch/beta-beam/

IDM2004 G. Gerbier

With 10 years running

IDM2004 G. Gerbier

5) An « 0ptimal » schedule for a Megaton Physics Project inEurope

Safety Tunnel

Large Cavity

R&D PMT’s, etc.

PMT’s production

2003 2004 2007 2008 2012 2015 2020

Detector installation

Start Megaton Physics

SPL + Super-beam realization

Procedure :

Beta-beam realization

excavation

excavation

R&D PMT’s, etc

PMT’s production

Detector inst.

Start Megaton Physics ………………...………………….

SPL+Super-beam realization

Beta-beam realization

EoI

Year

?

?

studyPre-study

LoI Prop Approv.

IDM2004 G. Gerbier

Outlook

• NB : advantages of Fréjus site– Good and known rock, horizontal access– Central location in Europe, easy access by train, car, plane,

ski…– Right distance to CERN for n osc studies

• Feasability study under way – Cavities shape, rock extraction and evacuation, cost

• PMT technology and R&D underway• Formation of collaboration

– Working group : coordinator J Bouchez (Saclay) bouchez@hep.saclay.cea.fr

– NNN (Neutrino and Nucleon decay) workshop in spring 2005 at Aussois, near Modane, organised together with UNO US collab

• Welcome…