„ A Hitchhiker`s guide to the IceCube Detector “

„ A Hitchhiker`s guide to the IceCube Detector “ Timo Griesel 4th VISTARS Workshop 2007 Rußbach, Austria Institut für Physik ETAP/IceCube Johannes Gutenberg Universität, Mainz 7th of March 2007

IceCube Collaborators __________________________________________________ _________________________________________________ Europe (15) USA (14) • Universite Libre de Bruxelles, Belgium • Vrije Universiteit Brussel, Belgium • Université de Mons-Hainaut, Belgium • Universiteit Gent, Belgium • Humboldt Universität, Germany • Universität Mainz, Germany • DESY Zeuthen, Germany • Universität Dortmund, Germany • Universität Wuppertal, Germany • MPI Heidelberg, Germany • Uppsala University, Sweden • Stockholm University, Sweden • Imperial College, London, UK • Oxford University, UK • Utrecht University, Netherlands • 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 • Alabama University, USA • Bartol Research Institute, Delaware, USA • Pennsylvania State University, USA • UC Berkeley, USA • UC Irvine, USA • Clark-Atlanta University, USA • University of Alaska, Anchorage, USA • Univ. of Maryland, USA Japan (1) Japan (1) New Zealand (1) • Chiba University, Japan • University of Canterbury, Christchurch, NZ p. 1 / 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Physics Motivations for Neutrino Observatory __________________________________________________ _________________________________________________ Search for cosmic-ray accelerators • Active galactic nuclei • Supernova remnants • Gamma-ray bursts • Neutrinos are ideal messenger  carry information from potentially deep within a source, pointing back to it. • Protons except for EHE are bent in magnetic fields. • EHE protons interaction on CMBR • HE photons are absorbed by interaction • with CMBR p. 2 / 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Physics Motivations for Neutrino Observatory __________________________________________________ _________________________________________________ p. 3 / 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

The Location __________________________________________________ _________________________________________________ Amundsen-Scott Station IceCube !!! McMurdo South Pole Station (US) p. 4 / 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

IceCube Detector __________________________________________________ _________________________________________________ Design Specifications • Fully digital detector concept. • Number of strings – 70 • Number of surface tanks – 140 • Number of DOMs – 4800 • Instrumented volume – 1 km3 • Angular resolution of in-ice array < 1.0° Current Status • 22 strings, 44 surface stations • 1320 deployed DOMs, • Instrumented volume ~ 0.25 km3 • Work still in progress • Collecting physics data p. 5 / 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

The site __________________________________________________ _________________________________________________ C130-Skyway Amundsen-Scott Station AMANDA-Counting House South Pole I3-Counting House EHWD - Camp p. 6 / 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Cherenkov Radiation __________________________________________________ _________________________________________________ Wave moves at characteristic speed: In medium : This leads to : Cherenkov Relation Surface of Mach cone C Number of produced Photons : p. 10/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

IceCube Digital Optic Module (DOM) __________________________________________________ _________________________________________________ p. 11/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Deployment of IceCube DOMs - EHWD __________________________________________________ _________________________________________________ EHWD (Enhanced Hot Water Drill) designed to drill a 2450 m × 60 cm hole in ~30 hr. Thermal Power: 4.5 Megawatt p. 12/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Deployment of IceCube DOMs - Drilling __________________________________________________ _________________________________________________ Top layer of packed snow is called firn. Hot water drill designed for ice drilling – it gets starter hole from firn drill (lower left). EHWD drill head entering hole (Top left and top right). p. 13/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Deployment of IceCube DOMs __________________________________________________ _________________________________________________ Upper right: AMANDA OM in -840m Lower right: DOM low down in the hole Upper left: DOM hook up right before the low down Middle: Hooked up DOM p. 14/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

IceTop – The surface unit __________________________________________________ _________________________________________________ IceTop – Airshower detector p. 15/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

Physics Motivations for Neutrino Observatory __________________________________________________ _________________________________________________ p. 16/ 20 4th VISTARS Russbach Workshop, 03/03-03/10/2007, Russbach Austria

„ A Hitchhiker`s guide to the IceCube Detector “