Network on Direct Dark Matter Search ILIAS N3
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1 Network on Direct Dark Matter Search ILIAS N3 N3 Dark Matter 2/25/2008 ILIAS 1
2 ILIAS-N3 Dark Matter Network Participating Institutions France: CNRS/CEA CNRS/SPM/CRTBT Grenoble CNRS/IN2P3/IPN Lyon CNRS/IN2P3/CSNSM Orsay ICNRS/IAS Orsay CNRS/INSU/IAP Paris CEA/DSM/DAPNIA Saclay CEA/DSM/DRECAM Saclay Modane Underground Laboratory Italy: INFN Dipartimento di Fisica G. Occhialini dell'universit dimilano-bicocca Laboratori Nazionale del Gran Sasso Germany: TU Munich, Uni Tübingen Max-Planck-Inst. Nucl. Phys., Heidelberg Technical University Munich Eberhard Karls University Tuebingen Max-Planck-Institute for Physics, Munich Institut Physik.Hochtechnologie IPHT, Jena EDELWEISS low background cryogenic detectors CRESST low background cryogenic detectors Forschungszentrum Karlsruhe Institut für Kernphysik University Karlsruhe Institut für exp. Kernphysik Max-Planck-Institute for Extraterrestrial Physics, Garching Technical University Darmstadt Frankfurt University United Kingdom: Uni Sheffield London Imperial College Oxford University - Department of Physics Rutherford-Appleton Laboratory - High Energy Physics Sheffield University- High Energy Physics, Sheffield Boulby Underground Laboratory, Boulby Spain : Uni Zaragoza University of Zaragoza - Laboratory of Nuclear and High Energy Physics Switzerland: University Bern. Laboratory of High Energy Physics Greece: Uni Thessaloniki Thessaloniki University University of Patras Tuerkey: Uni Istanbul Bogazici University, Istanbul Serbia: University of Novi Sad ZEPLIN, DRIFT low background liquid Xenon, gas Ge Detectors Dark Matter CAST AXION Search High Purity Materials Low Background and Shielding 2/25/2008 ILIAS 2
3 Network Structure WG1-CDC: J.C.Lanfranchi WG2-LX : N.Spooner TUM Munich Sheffield/ A.Rubbia - ETH Zürich (ArDM) and L.Baudis Zürich (XENON) WG3-GeNaI: M.Sarsa Zaragoza WG4-AD: E.Daw Sheffield WG5-BSNS: V.Kudryavtsev WG6-HPMP: R.Lemrani WG7-AXION: K.Zioutas WG8-COMM: J.Jochum and G.Chardin Sheffield CEA Patras Tübingen / CEA 2/25/2008 ILIAS 3
4 Dark Matter and Dark Energy Outstanding question : What is the Universe made of? Ordinary (baryonic) matter only represents only 4% of the Universe energy content 2/25/2008 ILIAS 4
5 Dark Matter search for physics beyond the Standard Model new elementary particles Supersymmetry??? AXION??? 2/25/2008 ILIAS 5
6 Natural WIMP : SUSY Lightest particle χ 0 1 = N 11 B + N 12 W 3 + N 13 H N 14 H 2 gaugino fraction: Z g = N N12 2 Stable if SUSY exists and R-parity is conserved Direct detection: WIMP scattering off nuclei PMTs PEEK Supports Grids Waveshifter/Reflector Cathode 2/25/2008 ILIAS 6
7 Dark Matter Search in ILIAS directional 2/25/2008 ILIAS 7
8 Edelweiss: event-by-event discrimination Charge + Heat Measurement Neutron + gamma calibration Nuclear recoil discrimination down to 20 kev threshold : γ-ray rejection > % 2/25/2008 ILIAS 8
9 EDELWEISS promising results with active rejection of surface events NbSi thin films or interdigitized electrodes 2/25/2008 ILIAS 9
10 CRESST background rejection by light vs. phonons kg days 90% of nuclear recoils with quenching factor 7.4 below this line 2004: no neutron shield 90% of nuclear recoils with quenching factor 40 (tungsten) below this line 2/25/2008 ILIAS 10
11 PE- shielding and muon veto 50 cm PE shielding (12 tons) Plastic scintillator muon veto 2/25/2008 ILIAS 11
12 CRESST with neutron shield 2007 data two 300gr detector modules 2/25/2008 ILIAS 12
13 Liquid Noble Gases (Xenon / Argon) background rejection by light vs. charge 2/25/2008 ILIAS 13
14 XENON neutron and gamma calibrations Charge + Light Measurement Gamma calibration QuickTime QuickTime et et un un décompresseur décompresseur TIFF TIFF (non (non compressé) compressé) sont sont requis requis pour pour visionner visionner cette cette image. image. Nuclear recoil AmBe calibration J. Angle et al., astro-ph: /25/2008 ILIAS 14
15 Dirty argon WARP 2.3 lt at LNGS Impressive > 10 7 background rejection factor Procurement of 39 Ar depleted argon in future 2/25/2008 ILIAS 15
16 ZEPLIN II WIMP Search Data 2/25/2008 ILIAS 16
17 XENON10 WIMP Search Data 2/25/2008 ILIAS 17
18 Experimental status and strategy Most experiments (below, XENON) are recording background events, and testing strategies to remove them Goal 20xx pbarn Factor 300 progress in sensitivity still required compared to best present sensitivities cooperation towards large scale experiments cryogenic=> EURECA liquid gases => XENON, ZEPLIN, WARP 10-8 soon! CRESST CDMS XENON-10 2/25/2008 ILIAS 18
19 ILIAS-N3 Dark Matter Network Structure Working-Groups Detection Concepts Common Activities Cryogenic Detectors and Cryostat Non cryogenic Detectors and liquid Xenon Germanium and NaI Detectors Advanced Detectors including directional Concepts Axion Searches Background Simulation, Neutron-Shield and Muon-Vetos High Radiopurity Materials and Materials Purification Common Activities Convergence on the optimum last year strategy for large Convergence scale detector based on each of the alternatives 1 th 2 th 3 th 4 th Year Convergence on the strategy for future large scale European Dark Matter experiments 2/25/2008 ILIAS 19 => cooperation between working groups many combined meetings and activities
20 WG 1-4 (Detector Technologies) to do Year 4 identify combined needs (e.g. purity, shielding.) with other working groups strategy on integration of the cryogenic system /liquid xenon into external shield integration of detector, read out and cooling techniques assessment on comparison with other techniques Meetings: June Grenoble: BSNS, CDC, LX, HPMP June - CERN: COMMON Strategy, all European DM groups (except WARP) July Sheffield: AD September Zaragoza:; BSNS, AD October Garching: CDC BSNS November Tübingen: CDC November Sheffield, LX December Modane: CDC, BSNS 2/25/2008 ILIAS 20
21 WG 1-4 (Detector Technologies) Integration of Read Out Electronic 2/25/2008 ILIAS 21
22 WG 1-4 (Detector Technologies) Integration Cryogenics into Sheilding 2/25/2008 ILIAS 22
23 WG 1-4 (Detector Technologies) Large Cryostat Concepts 2/25/2008 ILIAS 23
24 WG 1-4 (Detector Technologies) Vibration Insulation of Cryogenic Systems 2/25/2008 ILIAS 24
25 Collaborations Design Study Proposals for 1 ton scale projects EURECA, ELIXIR in Design Study: Integration of EURECA into ULYSSES December Meeting at Modane 2/25/2008 ILIAS 25
26 WG 5 BSNS : many groups involved in simulations on shielding strategy, purity requirements estimates on neutron yields from radioactivity in rock in the Cu / Pb in the PE shields e.g. some 10 neutrons / year in 12 tons of CRESST PE shield ~ 4000 neutrons / year per ppb U in 10 t Pb shield 2/25/2008 ILIAS 26
27 WG 6 - HPMP in cooperation with JRA 1 collection of existing data on material purity organization knowledge base identify purity demands of different detector concepts include results on purity into Monte Carlo Codes of different detector concepts => New database on material purification techniques => With keyword search, display of details and links => Can be filled by external users through a form 2/25/2008 ILIAS 27
28 Different groups work on purification of liquids and surfaces : We propose a database gathering this information : 2/25/2008 ILIAS 28
29 WG 7 - AXION > 50 participants reports on AXION experiments (PVLAS, shining through the wall) reports on WIMP experiments exchange WIMP AXION community theory: huge discovery potential for fundamental physics 2/25/2008 ILIAS 29
30 WG 8 - COMMON - co-ordinating cooperation between working groups - thesis funded by N3: Vito Tomasello, thesis at Sheffield 1st year at Sheffield 2nd year at Tübingen simulation of neutron induced recoil events - participation to the Dark Matter roadmap in the US, DUSEL process, publication of the DMSAG report -definition of the ASPERA Eranet European roadmap for Dark Matter Phase II => ILIAS N3 is leading effort for the DM part of the ASPERA/APPEC roadmap - Training Session on WIMP data analysis - Data Tool Webpage by Rachid Lemrani 2/25/2008 ILIAS 30
31 WG 8 - COMMON Training Session - From Data to WIMP Limits January 11 14, Aussois 30 participants maximum likelihood and methods that approximate it (chisquare, projection correlation analysis, etc.) model-less methods (neutral nets and boosted decision trees). calibration/correction for position dependence/reconstruction calculation of confidence intervals. thanks to Richard Schnee Syracuse University CDMS collaboration talks by: EDELWEIS, ZEPLIN, CRESST, DMTools 2/25/2008 ILIAS 31
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