Transcript IceCube
IceCube IceCube is the world’s largest neutrino telescope, under construction at the South Pole IceCube – the collaboration BELGIUM GREAT BRITAIN Université Libre Imperial College Université de Mons-Hainaut Oxford University University of Gent Vrije Universiteit Brussel USA GERMANY Amundsen-Scott station DESY Zeuthen Clark Atlanta University Humboldt U. Berlin IAS Princeton MPI Heidelberg LBNL - Berkeley RWTH Aachen Penn State University U. Dortmund Southern U. and A&M U. Mainz U. Alaska Anchorage U. Wuppertal UC Berkeley UC Irvine JAPAN U. Delaware (Bartol) Chiba University U. Kansas U. Maryland NEW ZEALAND University of Canterbury SWEDEN Stockholm University Uppsala University HOLLAND Steven Nelson, "ice cube" Utrecht University U. Wisconsin Madison U. Wisconsin River Falls The Swedish members STOCKHOLM UPPSALA Christian Bohm (hardware) Thomas Burgess (WIMPs) Per-Olof Hulth (WIMPs) Klas Hultqvist (simulation) Henrik Johansson (UHE) Lars Thollander (hardware) Christian Walck (WIMPs) Christin Wiedemann (UHE) Gustav Wikström (WIMPs) Olga Botner (WIMPs) Olle Engdegård (WIMPs) Allan Hallgren (UHE) Carlos de los Heros (exotics) Johan Lundberg (UHE) Olivo Martino (GRBs) Arvid Pohl (exotics) Overview Neutrino sources • Detection principle • Detector overview • Reconstruction • Current status • Future extensions • Neutrino sources SuperNova Remnants Topological defects Atmospheric neutrinos Supernovae MeV GeV Dark matter Gamma Ray Bursts GZK-neutrinos PeV TeV EeV Black holes Cosmic rays Active galactic nuclei 07 July 2015 Henrik Johansson (Exotics: magnetic monopoles, q-balls...) 5 Detection principle 07 July 2015 Henrik Johansson Neutrino interactions 6 Detection principle Cherenkov radiation 07 July 2015 Henrik Johansson 7 Detector overview In-ice detector consists of digital optical modules (DOMs) installed on strings at 07 July 2015 depths of 1450 m to 2450 m. Henrik Johansson 8 Digital Optical Module 25 cm PMT Self-contained, reconfigurable digital DAQ system Timing resolution < 2 ns Robust, low failure rate (1 %) About 18 % of DOMs are assembled and tested in Stockholm and Uppsala 07 July 2015 Henrik Johansson 9 Reconstruction Each DOM registers time and number of photoelectrons – enables reconstruction of direction and energy Angular resolution of muon track > 1 TeV ~ 1.5 deg Detection threshold O(10 GeV) 07 July 2015 Henrik Johansson 10 Reconstruction E = 6000 TeV E = 375 TeV - e e + N e- +X Signatures: track, cascade, double bang 07 July 2015 Henrik Johansson + N - +X 11 Current status 2006 - 2007: 13 strings deployed 2007 Total: 22 strings, 26 IceTop stations Average drilling time ~34 hours, installation of string ~12 hours Expect to install up to 18 strings next season 1 Swedish winter-over, 5 Swedish drillers Finished by 2011 with 80 strings, 1 km3 10 IceTop stations 2005 - 2006: 8 strings 12 IceTop stations 2004 - 2005 : 1 string 4 IceTop stations AMANDA 19 strings 677 modules 07 July 2015 Henrik Johansson 12 Point sources 1st IceCube data sky map Maximum deviation is 3.35 sigma: consistent with random fluctuations 137 d IC9 Averaged Sensitivity: 12 x 10-8 (E/GeV)-2 GeV-1 cm-2 s-1 1001 d AMANDA-II Averaged Sensitivity: 5 x 10-8 (E/GeV)-2 GeV-1 cm-2 s-1 07 July 2015 Henrik Johansson 13 WIMPs Earth WIMPs 07 July 2015 Solar WIMPs Henrik Johansson 14 Future extensions The IceCube Low Energy Core Project: Deep Core 07 July 2015 Henrik Johansson 15 Future extensions South Pole Acoustic Test Setup Possible hybrid array AURA Digital Radio Module 07 July 2015 Henrik Johansson 16 Summary • AMANDA has delivered results for 7 years and will continue as part of IceCube (low energy) • More than a quarter of IceCube has been deployed (IC22) • First physics analyses have been performed using data from the IceCube 9 string array • Many exiting physics searches possible thanks to the multi-purpose nature of the detector • 1 cubic kilometer (80 strings) will be instrumented by 2011 • Efforts are underway to extend the detector in both the low energy and UHE domains http://www.icecube.wisc.edu Extra slides 07 July 2015 Henrik Johansson 19 Reconstruction Neutrino flavor Full flavor ID supernovae IceCube flavor ID, direction, energy IceCube triggered, partial reconstruction e e Showers vs tracks 6 9 12 TeV 15 PeV 18 21 Log(ENERGY/eV) 07 July 2015 Henrik Johansson 20 IceTop 07 July 2015 Henrik Johansson 21 Atmospheric neutrinos 07 July 2015 Henrik Johansson 22 Magnetic monopoles 07 July 2015 Henrik Johansson 23 Summary • AMANDA has delivered results for 7 years. It will continue as part of IceCube (low energy) • More than a quarter of IceCube has been deployed (IC22) • First physics analyses have been performed using data from the IceCube 9 string array • Many exiting physics searches possible thanks to the multi-purpose nature of the detector • 1 cubic kilometer (80 strings) will be instrumented by 2011 • Efforts are underway to extend the detector in both the low energy and UHE domains 07 July 2015 Henrik Johansson 24