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LSM - Fréjus underground sites status and projects

LSM - Fréjus underground sites status and projects. Gilles Gerbier CEA/Saclay - LSM. Fréjus. Entrance of road tunnel. Modane. COMMISSARIAT À L’ÉNERGIE ATOMIQUE. Torino. Chambéry. The lab now (2004). 1 .6 10 -6 fast neutrons/cm 2 /s from rock/concrete radioactivity

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LSM - Fréjus underground sites status and projects

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  1. LSM - Fréjus underground sitesstatus and projects Gilles Gerbier CEA/Saclay - LSM

  2. Fréjus Entrance of road tunnel Modane COMMISSARIAT À L’ÉNERGIE ATOMIQUE

  3. Torino Chambéry

  4. 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 • 1750 rock thickness • 4800 mwe • 4 muons /m2/ day

  5. Near future • 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

  6. Edelweiss II - how to install a 100 T set up of 5 * 3 m * 3m + services in this free space ?

  7. Future plans New safety gallery Start 2005 New Lab ?? Project

  8. Routier ITALIE DETECTEURS Galerie de CHERENKOV secours Actual laboratory 3 3500 m Large laboratory 3 1 000 000 m FRANCE Artist view Ph C Le salon de la nouveauté et des savoir-faire le 12 et 13 Octobre 2002 . LSM. Towards a Large International Underground Laboratory Neutrino properties, proton decay, supernovae…

  9. How to measure 13 and d Study nm ne oscillations at first maximum L= 500 km/GeV x En with E = 260 MeV (see later CERN beams) then L= 130 km compare amplitudes for neutrinos and antineutrinos = A2 + S2 + 2AS sin d = A2 + S2 - 2AS sin d A(atm) = 21/213 S (sun) ~ 0.04 for LMA but need high intensity n beam ie MW proton beam…

  10. Sending neutrinos from CERN to Fréjus… C.E.R.N Genève A6 130 Km Annecy Albertville C.E.R.N A 43 Lac du Lac Lac Massif Massif du bourget Léman d’Annecy du Fréjus Jura LYON Chambéry St Jean de Modane Maurienne Grenoble Turin Valence FROM CERN TO Fréjus : 131 km for neutrinos 164 km for cars

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

  12. New LINAC An ideal complementary ne beam : the « beta beam » • Concept proposed byPiero Zucchelli at CERN • Produce radioactive ions (ISOL technique), 6He and 18Ne • Accelerate them in the CERN accelerator complex up to G 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 ( n m contamination ~ 10 -4 ) • perfectly known energy spectrumhttp://beta-beam.web.cern.ch/beta-beam/

  13. With 10 years running

  14. 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…

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