IDM2004 G. Gerbier LSM - Fréjus underground sites status and projects Gilles Gerbier CEA/Saclay - LSM.

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IDM2004 G. Gerbier LSM - Fréjus underground sites status and projects Gilles Gerbier CEA/Saclay - LSM

IDM2004 G. Gerbier Fréjus Modane Entrance of road tunnel COMMISSARIAT À LÉNERGIE ATOMIQUE

IDM2004 G. Gerbier Torino Chambéry

IDM2004 G. Gerbier The lab now (2004) fast neutrons/cm 2 /s from rock/concrete radioactivity - air continuously renewed : 2 vol/hour - very low Rn concentration 5-10 Bq/ m fast neutrons/cm 2 /s from rock/concrete radioactivity - air continuously renewed : 2 vol/hour - very low Rn concentration 5-10 Bq/ m rock thickness mwe - 4 muons /m 2 / day rock thickness mwe - 4 muons /m 2 / 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 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 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 = A 2 + S 2 + 2AS sin = A 2 + S 2 - 2AS sin atm) = 2 1/2 13 S (sun) ~ 0.04 for LMA but need high intensity beam ie MW proton beam…

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 dAnnecy 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 Fréjus…

IDM2004 G. Gerbier SPL beam produces « super beam » = low energy 260 MeV neutrino beam CERN working groups results

IDM2004 G. Gerbier New LINAC An ideal complementary e beam : the « beta beam » Concept proposed by Piero Zucchelli at CERN Produce radioactive ions (ISOL technique), 6 He and 18 Ne 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 detector Advantages : strongly focussed neutrino beam due to small Q value of beta decays very pure flavour composition ( contamination ~ ) perfectly known energy spectrum

IDM2004 G. Gerbier With 10 years running

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