ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 1 Present status Present status Work in progress Work in progress JRA1. LBT-DUSL Low background techniques for deep underground sciences

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 2 WP 1. Key objectives To measure the environmental background components (neutrons, gammas, muons, Rn contamination in the air and in the water...) in the four underground sites in a coherent and coordinated way. The joint research effort should optimise the know-how of the different participants. This is extremely important for the interpretation of data and for planning future experiments.

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 3 WP 2. Key objectives To produce a reliable Monte Carlo library of simulation codes to identify and quantify the backgrounds in the EU underground sites in a variety of experimental conditions for the interpretation of data and for planning future experiments. The joint research effort should optimise the know-how of the different participants. Experimental results from Task 1 will be useful as the input of the simulations.

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 4 WP 3. Key objectives -Construction and upgrading of ultra low background facilities (ULBF) in the four underground labs forming an EU-coordinated service for applications in rare event physics and other fields of world-wide value. -Implementation of new techniques to deal with the background: active and passive shielding, veto systems, particle discrimination techniques, fragmentation of calorimeter detectors, control and suppression of radon levels... -Study of the feasibility of fabrication of detectors and materials underground.

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 5 WP 4. Key objectives -Collect new (and old) data on radioactive contamination and cosmogenic activation of materials used in rare-event physics experiments and ultra-low background instrumentation, using the new capabilities offered by the R&D and facilities of WP 3. -Development and test of purification techniques to improve the radio-purity of materials.

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 6 Management structure of JRA1 Activity coordinatorJulio Morales/José M. Carmona (LSC) Deputy coordinatorNicola Ferrari (LNGS) WP1. Background measurements in the deep underground sites: CoordinatorNicola Ferrari (LNGS) Deputy coordinatorsMarisa Sarsa/Gloria Luzón (LSC) WP2. Background simulations: CoordinatorGloria Luzón/Susana Cebrián (LSC) Deputy coordinatorVitaly Kudriavtsev (IUS) WP3. Low background facilities: CoordinatorMatthias Laubenstein (LNGS) Deputy coordinatorJean Louis Reyss (LSM) WP4. Radiopurity of the materials: Coordinator:Pia Loaiza (LSM) Deputy coordinator:Lino Miramonti (LNGS)

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 7Participants WPLNGSLSMLSCBoulby WP1- Background measurements and monitoring in the deep underground sites N. Ferrari A. Ianni C. Broggini C. Cattadori W. Plastino C. Vignoli G.L. Raselli A. Cesana J. Kisiel G. Gerbier D. Lalanne G. Luzon J.M. Carmona J. Morales M.L. Sarsa A. Ortiz J. Ruz V. Kudryavtsev J. McMillan J. Lewin B. Camanzi E. Tziaferi WP2- Background simulations L. Pandola S. Parlati P. Loaiza G. Gerbier M. De Jesus F. Piquemal S. Cebrián G. Luzon J.M. Carmona M. Martinez B. Beltran V. Kudryavtsev J. Davies B. Camanzi C. Bungau WP3- Low background facilities M. Laubenstein N. Ferrari C. Tomei M. Balata S. Shoenert H. Simgen J.L. Reyss Ph. Hubert D. Lalanne J.A. Villar J. Amare M.L. Sarsa J.M. Carmona M. Martinez J. Ruz S. Paling R. Luscher N. Smith C. Bungau J. McMillan WP4- Radiopurity of the materials L. Miramonti A. Ianni B. Caccianiga M. Laubenstein C. Tomei J. Kisiel P. Loaiza C. Goldbach P. Hubert R Gurriaran C. Marquet J. Puimedon M.L. Sarsa J.M. Carmona L. Torres S. Paling J. McMillan J. Lewin B. Camanzi

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 8 First JRA1 General Meeting Held in September 10, in Edinburgh Participants: LNGS Nicola Ferrari, Claudia Tomei, Lino Miramonti, Matthias Laubenstein LNGS Nicola Ferrari, Claudia Tomei, Lino Miramonti, Matthias Laubenstein IUS Neil Spooner, Vitaly Kudryavtsev, Alex Murphy IUS Neil Spooner, Vitaly Kudryavtsev, Alex Murphy LSM Gilles Gerbier, Pia Loaiza LSM Gilles Gerbier, Pia Loaiza LSCJulio Morales, José Manuel Carmona, Gloria Luzón, Susana Cebrián, María Martínez, Lidia Torres, Igor G. Irastorza LSCJulio Morales, José Manuel Carmona, Gloria Luzón, Susana Cebrián, María Martínez, Lidia Torres, Igor G. Irastorza Review of JRA1 goals WP presentations by coordinators of the activities Set-up of the working groups Set-up of the working groups Review of present status of the JRA1 activities Review of present status of the JRA1 activities Review of the goals for each WP Review of the goals for each WP Proposed actions Proposed actions

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 9 JRA1: status of the activity The official web page of the JRA1 activity has been set-up. It contains: A description of the JRA1 activity and general documents A description of the JRA1 activity and general documents JRA1 list of participants JRA1 list of participants Information on next and previous meetings Information on next and previous meetings Working group pages: participants, documents, evolution of the activities… Working group pages: participants, documents, evolution of the activities…

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ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 13 WP´s activities

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 14 WP1 activities (Background measurements in the deep underground sites)  Completed & undergoing activities Collecting existing data from each laboratory onCollecting existing data from each laboratory on neutron background, environmental gammas, radio purity of rock, concrete, etc…, radon monitoring (in air, water, …), muon fluxes Reports on these measurements are being collected by WP1 coordinatorReports on these measurements are being collected by WP1 coordinator Prepare contents for WP1 web page to be located on the main web page of JRA1 at LSCPrepare contents for WP1 web page to be located on the main web page of JRA1 at LSC Survey of environmental gamma-ray background (all labs; undergoing at LNGS, and Boulby with TARI project)Survey of environmental gamma-ray background (all labs; undergoing at LNGS, and Boulby with TARI project) Measurement of radiopurity of rock, concrete, etc... (all labs; undergoing at LNGS, LSC, ---)Measurement of radiopurity of rock, concrete, etc... (all labs; undergoing at LNGS, LSC, ---)

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 15 WP1 activities (Background measurements in the deep underground sites)  Neutron monitoring at the underground laboratories At LNGS a new measurement will be started by a Pavia INFN group in the next months At LNGS a new measurement will be started by a Pavia INFN group in the next months A group from Baksan is interested to start a collaboration with ILIAS for the measurement of neutron backgrounds with 3He liquid scintillator detector A group from Baksan is interested to start a collaboration with ILIAS for the measurement of neutron backgrounds with 3He liquid scintillator detector The same measurements will follows for other labs (TARI) The same measurements will follows for other labs (TARI) Collecting existing data from each laboratory onCollecting existing data from each laboratory on neutron background, environmental gammas, radio purity of rock, concrete, etc…, radon monitoring (in air, water, …), muon fluxes Rn monitoring in the air and water (ongoing since a few years at LNGS; soon at LSM, LSC, IUS)Rn monitoring in the air and water (ongoing since a few years at LNGS; soon at LSM, LSC, IUS)

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 16 WP2 activities (Background simulations)  Completed & undergoing activities At IDM04 a joint meeting of N3 BSNS and JRA1 WP2 activities was held, and work by every group presented and discussed At IDM04 a joint meeting of N3 BSNS and JRA1 WP2 activities was held, and work by every group presented and discussed A mailing distribution list has been created to optimize exchange of ideas (info: A mailing distribution list has been created to optimize exchange of ideas (info: An FTP repository for codes with (restricted) access through main JRA1 web page has been created (info: An FTP repository for codes with (restricted) access through main JRA1 web page has been created (info: Groups have been asked by WP coordinators to elaborate a report on the simulation codes they are using (comments, …)Groups have been asked by WP coordinators to elaborate a report on the simulation codes they are using (comments, …)  Next projects Comparison of codes; problems, bug and open questions detected Comparison of codes; problems, bug and open questions detected Preparation of a first set of Monte Carlo libraries for background simulations Preparation of a first set of Monte Carlo libraries for background simulations Design of strategies to compare results with experimental data Design of strategies to compare results with experimental data

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 17 WP3 activities (Low background facilities)  Completed & undergoing activities LNGS operates very low background Ge detectors developed by a collaboration between MPI and Canberra LNGS operates very low background Ge detectors developed by a collaboration between MPI and Canberra A facility for electroforming copper at LSC is under development A facility for electroforming copper at LSC is under development Reports on low background facilities at each underground laboratory are in preparation Reports on low background facilities at each underground laboratory are in preparation The laboratory for low-level radioactivity measurements at LNGS was presented by M. Laubenstein (see JRA1 web page) The laboratory for low-level radioactivity measurements at LNGS was presented by M. Laubenstein (see JRA1 web page)  Next projects To initiate the development of ultra-low background detectors, with the establishment of a prototype for the growth of detector crystalsTo initiate the development of ultra-low background detectors, with the establishment of a prototype for the growth of detector crystals A program of cross calibration of the Ge detectors in the different labs is under consideration through an exchange of reference materials. The consistency of data on radioactive contamination obtained by the different labs will then be checked.

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 18  Completed & undergoing activities A web page ( has been set-up to contain a data base on radio-purity of materials. It will be linked to the JRA1 main site. A web page ( has been set-up to contain a data base on radio-purity of materials. It will be linked to the JRA1 main site. Coordinators from each lab will collect data from measured materials Coordinators from each lab will collect data from measured materials ± ± 0.01 <0.2<0.3<0.12 < 0.3 VA OFHCCooper 54 Mn 57 Co 60 Co 40 K 137 Cs 210 Pb 235 U 208 Tl 212 Pb 228 Ac 214 Bi 214 Pb 234 Th 232 Th series 232 Th series 238 U series 238 U series Radionuclide concentration in dpm/kg Radionuclide concentration in dpm/kgProvider and Ref TypeMaterial Measured by EDELWEISS Type of detector Ge, type n, 200 LSM WP4 activities (Radio-purity of the materials)

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ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 21 Expected cost before Apr 2005 INFN used money (Sept-04)

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 22 Expected cost before Apr 2005 LSC used money (Sept-04)

ILIAS 3 EB meeting. Paris. October 2004 JRA1 web page 23 LSM expected cost before Apr 2005 Total available CEA+CNRS : 129 k€ Projected expenses : 129 k€ post doc 30 k€post doc 30 k€ support for one tech 11 k€support for one tech 11 k€ equipment to buy :equipment to buy : anti-radon system (can be done asap if OK) 42 k€ anti-radon system (can be done asap if OK) 42 k€ planar Germanium 24 k€ planar Germanium 24 k€ consumables (electronics, acquisition...) 16 k€consumables (electronics, acquisition...) 16 k€ T&S (about 15 travels of.4 k€ in France and out) 6 k€T&S (about 15 travels of.4 k€ in France and out) 6 k€