1 / 41

Request for CERN recognized experiment status for the IceCube neutrino telescope

Request for CERN recognized experiment status for the IceCube neutrino telescope. Per Olof Hulth Stockholm university hulth@physto. se. IceCube. Neutrino telescope to be built in the ice sheet at the South Pole, Antarctica

abram
Download Presentation

Request for CERN recognized experiment status for the IceCube neutrino telescope

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Request for CERN recognized experiment status for the IceCube neutrino telescope Per Olof Hulth Stockholm university hulth@physto.se

  2. IceCube • Neutrino telescope to be built in the ice sheet at the South Pole, Antarctica • Place 1450 m - 2450 m below the Amundsen - Scott base at the South Pole • Design and construction based on the experience from the AMANDA neutrino telescope • Spokesperson: Per Olof Hulth, Stockholm University, Sweden • US Principal Investigator: Francis Halzen, University Wisconsin, USA • Project Director: Jim Yeck, University of Wisconsin, USA Per Olof Hulth

  3. IceCube “North” AMANDA South Pole Dome road to work Summer camp 1500 m Amundsen-Scott South Pole station Per Olof Hulth 2000 m [not to scale]

  4. Cherenkov light myon Very transparent ice at large depth! neutrino Per Olof Hulth

  5. One milion atmospheric muons for each atmospheric neutrino myon Choose only muons from below! neutrino Per Olof Hulth

  6. Hot water -50 m -55 C -25 C -2500 m Per Olof Hulth

  7. AMANDA (Antarctic Muon And Neutrino Detector Array) The worlds largest neutrino telescope Built 1995-2000 19 strings with 670 optical modules “The seventh wonder of modern astronomy” “The wierdest” (Scientific American) Per Olof Hulth

  8. Optical module Drilling tower Per Olof Hulth

  9. -840 m Per Olof Hulth

  10. Neutrino interaction in AMANDA • AMANDA observes 3-4 atmospheric neutrinos per day Per Olof Hulth

  11. Highest energy event observed Electron neutrino interaction About 200 TeV Per Olof Hulth

  12. AMANDA data 2000 Direction of origin in the northern hemisphere of detected neutrinos in AMANDA Per Olof Hulth

  13. AMANDA data 2000 Per Olof Hulth

  14. Search for HE neutrino point sources Very PRELIMINARY Unbinned statistical analysis: use track resolution (→pdf) for each event significance map σ equatorial coordinates 2000-2002 data 922 events Highest: 3.41 Above 3σ: 1 Scrambled in azimuthal direction! Highest: 3.6 Above 3σ: 2 Expect 2.33 (from random distribution) Per Olof Hulth  No excess in significance beyond randomly expected

  15. WIMP annihilations in the centre of Earth Sensitivity to muon flux from neutralino annihilations in the center of the Earth: PRELIMINARY Muon flux limits Look for vertically upgoing tracks Eμ > 1 GeV NN optimized (on 20% data) to - remove misreconstructed atm. μ - suppress atmospheric ν - maximize sensitivity to WIMP signal Combine 3 years: 1997-99 Total live-time (80%): 422 days Disfavored by direct search (CDMS II) No WIMP signal found Limit for “hardest” channel: Per Olof Hulth

  16. WIMP annihilations in the Sun Increased capture rate due to addition of spin-dependent processes Sun is maximally 23° below horizon Search with AMANDA-II possible thanks to improved reconstruction capabilities for horizontal tracks Exclusion sensitivity from analyzing off-source bins 2001 data 0.39 years livetime PRELIMINARY Muon flux limits Eμ > 1 GeV No WIMP signal found Best sensitivity (considering livetime) of existing indirect searches using muons from the Sun/Earth Per Olof Hulth

  17. Despite AMANDA being the worlds largest Neutrino Telescope, it is expected to be too small!! No cosmic neutrinos observed in AMANDA yet. We need a telescope with a volume of one km3! IceCube!! Per Olof Hulth

  18. IceCube Collaboration • 28 institutes in nine countries and five continents • 12 institutes in Europe • In total about 170 scientists and about 70 from Europe (95 US) Per Olof Hulth

  19. Bartol Research Institute, Delaware, USA* • Univ. of Alabama, USA • Pennsylvania State University, USA * • UC Berkeley, USA * • Clark-Atlanta University, USA • Univ. of Maryland, USA • UC Irvine, USA * * Also AMANDA • IAS, Princeton, USA • University of Wisconsin-Madison, USA * • University of Wisconsin-River Falls, USA * • LBNL, Berkeley, USA * • University of Kansas, USA * • Southern University and A&M College, Baton Rouge, USA USA (13) Japan (1) Europe (12) Venezuela (1) • Chiba university, Japan • University of Canterbury, Christchurch, NZ • Universidad Simon Bolivar, Caracas, Venezuela * New Zealand (1) ANTARCTICA • Universite Libre de Bruxelles, Belgium * • Vrije Universiteit Brussel, Belgium * • Université de Mons-Hainaut, Belgium * • Universität Mainz, Germany * • DESY-Zeuthen, Germany * • Universität Dortmund, Germany * • Universität Wuppertal, Germany * • Uppsala university, Sweden * • Stockholm university, Sweden * • Imperial College, London, UK • Oxford university, UK • Utrecht,university, Netherlands Per Olof Hulth

  20. Scientific goals • Search for High Energy Neutrino sources in Cosmos (the origin of the cosmic rays?) • Search for dark matter particle annihilation (WIMPs) in the centre of Sun and Earth • Supernova search • Magnetic monopoles, slowly moving particles • Cosmic ray composition (IceTop + IceCube) • Discover something unexpected….. Per Olof Hulth

  21. IceTop AMANDA South Pole Skiway 1450 m 2450 m IceCube • 80 Strings • 4800 PMT in ice • Instrumented volume: 1 km3 (1 Gt) • IceCube is designed to detect neutrinos of all flavors at energies from 107 eV (SN) to 1020 eV • Icetop 160 tanks with total 320 PMT Per Olof Hulth

  22. Total Baseline Cost by Year ($M) PY01 PY02 PY03 PY04 PY05 PY06 PY07 PY08 PY09 TOTAL US 14.43 24.31 41.74 51.20 49.87 26.45 21.78 11.33 0.95 242.07 NON-US 0 2.22 5.10 6.71 6.99 5.42 2.09 1.16 0 29.70 TOTAL 14.43 26.53 46.85 57.91 56.86 31.87 23.87 12.49 0.95 271.77 US funding 100% from National Science Foundation (MRE) Per Olof Hulth

  23. European contributions • Belgium About 1.5 $M for hardware (approved) • FNRS (Fonds National de la Recherche Scientifique) and FWO (Fonds voor Wetenschappelijk Onderzoek), the French and Flemish Funds for Scientific Research : • Interuniversity Attraction Poles Programme - Belgian Science Policy • Germany • DESY About 4.3 $M for hardware(approved) • DESY: 90% Federal Ministry of Education and Research (BMBF Bundesministerium fuer Bildung und Forschung) • 10% Ministry of Science of the Land Brandenburg • Universities About 1.6 $M for hardware (not yet approved) • Federal Ministry of Education and Research • Deutsche Forschungsgemeinschaft DFG • Sweden About 4 $M for hardware (approved) • Swedish Research Council (state) • K & A Wallenberg Foundation (private) • Swedish Polar Research Secretariat (state) Per Olof Hulth

  24. Constructing IceCube • The IceCube Project office in Madison with Jim Yeck as Project Director has the direct responsibility for the construction of IceCube. • The IceCube Collaboration Board has the responsibility for scientific questions Per Olof Hulth

  25. Per Olof Hulth

  26. t decays t decays 1 PeVt(300m) nt interaction nt t Per Olof Hulth

  27. n - flavors and energy ranges •Filled area: particle id, direction, energy • Shaded area: energy only

  28. atm v signal Assume generic flux dN/dE = 10 –7 E-2 (cm-2s-1sr-1GeV) Expect ~103 events/year after atm m rejection ~75 events/year after energy cut cf background 8 atm n blue: after atm m rejection red: after Emcut Sensitivity (1 y):8.110-9 E-2 (cm-2s-1sr-1GeV) Per Olof Hulth Diffuse nmflux

  29. penetrator HV board flasher board pressure sphere DOM main board delay board PMT optical gel mu metal cage Digital Optical module (DOM) • an optical sensor 10 inch Hamamatsu R-7081 • a self-contained ”mini”-DAQ • records • timestamps • digitizes • stores • transmits to surface at request Per Olof Hulth

  30. 10” PMT Hamatsu-70 Per Olof Hulth

  31. IceCube • First 4 (?) strings to be deployed January 2005 • The rest of the strings • 12 strings 05/06 • 16 strings 06/07 • 18 strings 07/08 • 18 strings 08/09 • 12 strings 09/10 • We start taking data when the first strings are deployed! • AMANDA will be part of the IceCube telescope (One collaboration March 2005) Per Olof Hulth

  32. Transports • Christchurch New Zealand • Christchurch - McMurdo 5-9 h by plane (C17 or Hercules). • McMurdo - South Pole, 3 h by Hercules South Pole McMurdo From Christchurch New Zealand Per Olof Hulth

  33. European activities • Europe will produce and test 880 + 1300 out of 4800 DOMs • European as the Spokesperson 2+2 years (2001-2005) • European leads in Simulation, Reconstruction and AMANDA integration • European industry will most probably deliver the string cables (Ericsson, Sweden or JDR, Netherlands) • The European groups are very strong in data analysis (experiences from AMANDA) Per Olof Hulth

  34. Drill equipment arriving McMurdo November 2004 Per Olof Hulth

  35. The new South Pole station Per Olof Hulth

  36. The new Station restaurant Per Olof Hulth

  37. View from the new station Per Olof Hulth

  38. IceCube drill camp construction site of the first hole, Nov 25, 2004 Per Olof Hulth

  39. Per Olof Hulth

  40. IceCube as a CERN recognized project • Be able to organize meetings at CERN • Be able to use library and electronic journals • Be able to use CERN software • To have team accounts • To be able to have computing accounts Per Olof Hulth

  41. Belgium Univ. Libre de Bruxelles, D. Bertrand Vrije Univ. Brussel, C. De Clercq Univ. de Mons-Hainaut, P. Herquet Germany Univ. Mainz, L. Koepke DESY-Zeuthen, C. Spiering Univ. Dortmund, W. Rohde Univ. Wuppertal K-H. Kampert Sweden Stockholm univ. P.O. Hulth Uppsala univ. A. Hallgren Netherlands Utrecht univ. N. van Eijndhoven UK Imperial Collage I. Liubarsky Oxford univ. S. Sakar European PIs Per Olof Hulth

More Related