A novel microstructure based model to explain the IceCube ice anisotropy
International Cosmic Ray Conference, pp. 1119
Abstract
The IceCube Neutrino Observatory instruments about 1 km$^3$ of deep, glacial ice at the geographic South Pole using 5160 photomultipliers to detect Cherenkov light of charged relativistic particles. Most of IceCube's science goals rely heavily on an ever more precise understanding of the optical properties of the instrumented ice. A curious light propagation effect observed by the experiment is an anisotropic attenuation, which is aligned with the local flow of the ice. Having recently identified curved photon trajectories resulting from asymmetric light diffusion in the birefringent polycrystalline microstructure of the ice as the most likely underlying cause of this effect, work is now ongoing to optimize the model parameters (effectively deducing the average crystal size and shape in the detector). We present the parametrization of the birefringence effect in our photon propagation simulation, the fitting procedures and results as well as the impact of the new ice model on data-MC agreement.
Authors 99
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Johannes Gutenberg University Mainz · RWTH Aachen University
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
Institute of Physics , University of Mainz , D-55099 Mainz , Germany
III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany
Institute of Physics, University of Mainz, D-55099 Mainz, Germany
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Affiliation as printed
Université Libre de Bruxelles , Science Faculty CP230 , B-1050 Brussels , Belgium
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Affiliation as printed
Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium
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Affiliation as printed
Department of Physics and Laboratory for Particle Physics and Cosmology , Harvard University , Cambridge , MA 02138 , USA
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Affiliation as printed
Department of Physics and Laboratory for Particle Physics and Cosmology , Harvard University , Cambridge , MA 02138 , USA
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Massachusetts Institute of Technology
Affiliation as printed
Dept. of Physics , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA
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Affiliation as printed
Université Libre de Bruxelles , Science Faculty CP230 , B-1050 Brussels , Belgium
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University of California, Berkeley
Affiliation as printed
Dept. of Physics , University of California , Berkeley , CA 94720 , USA
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Affiliation as printed
Fakultät für Physik & Astronomie , Ruhr-Universität Bochum , D-44780 Bochum , Germany
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Affiliation as printed
Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan
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Lawrence Berkeley National Laboratory · University of California, Berkeley
Affiliation as printed
Dept. of Physics , University of California , Berkeley , CA 94720 , USA
Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA
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University of Alberta · Friedrich-Alexander-Universität Erlangen-Nürnberg
Affiliation as printed
Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 26 Erlangen Centre for Astroparticle Physics,
Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
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Johannes Gutenberg University Mainz · RWTH Aachen University
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
Institute of Physics , University of Mainz , D-55099 Mainz , Germany
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Johannes Gutenberg University Mainz · RWTH Aachen University
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
Institute of Physics , University of Mainz , D-55099 Mainz , Germany
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Affiliation as printed
Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
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University of Alberta · Friedrich-Alexander-Universität Erlangen-Nürnberg
Affiliation as printed
Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 26 Erlangen Centre for Astroparticle Physics,
Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
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University of Wisconsin–Madison · The University of Adelaide
Affiliation as printed
Department of Physics , University of Adelaide , Adelaide , 5005 , Australia
Dept. of Physics and WIPAC , University of Wisconsin , Madison , WI 53706 , USA
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University of Wisconsin–Madison · The University of Adelaide
Affiliation as printed
Department of Physics , University of Adelaide , Adelaide , 5005 , Australia
Dept. of Physics and WIPAC , University of Wisconsin , Madison , WI 53706 , USA
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Georgia Institute of Technology
Affiliation as printed
School of Physics and Center for Relativistic Astrophysics , Georgia Institute of Technology , Atlanta , GA 30332 , USA
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University of Wisconsin–Madison · The University of Adelaide
Affiliation as printed
Department of Physics , University of Adelaide , Adelaide , 5005 , Australia
Dept. of Physics and WIPAC , University of Wisconsin , Madison , WI 53706 , USA
Department of Physics, University of Adelaide, Adelaide, 5005, Australia
Dept. of Physics and WIPAC, University of Wisconsin, Madison, WI 53706, USA
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Massachusetts Institute of Technology
Affiliation as printed
Dept. of Physics , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA
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Massachusetts Institute of Technology
Affiliation as printed
Dept. of Physics , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA
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Affiliation as printed
Vrije Universiteit Brussel (VUB) , Dienst ELEM , B-1050 Brussels , Belgium
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Affiliation as printed
Vrije Universiteit Brussel (VUB) , Dienst ELEM , B-1050 Brussels , Belgium
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Johannes Gutenberg University Mainz · RWTH Aachen University
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
Institute of Physics , University of Mainz , D-55099 Mainz , Germany
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Georgia Institute of Technology
Affiliation as printed
School of Physics and Center for Relativistic Astrophysics , Georgia Institute of Technology , Atlanta , GA 30332 , USA
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Affiliation as printed
Vrije Universiteit Brussel (VUB) , Dienst ELEM , B-1050 Brussels , Belgium
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Affiliation as printed
Vrije Universiteit Brussel (VUB) , Dienst ELEM , B-1050 Brussels , Belgium
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Affiliation as printed
Vrije Universiteit Brussel (VUB) , Dienst ELEM , B-1050 Brussels , Belgium
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Humboldt-Universität zu Berlin
Affiliation as printed
Institut für Physik , Humboldt-Universität zu Berlin , D-12489 Berlin , Germany
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Johannes Gutenberg University Mainz · RWTH Aachen University
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
Institute of Physics , University of Mainz , D-55099 Mainz , Germany
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Massachusetts Institute of Technology
Affiliation as printed
Dept. of Physics , Massachusetts Institute of Technology , Cambridge , MA 02139 , USA
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Johannes Gutenberg University Mainz · RWTH Aachen University
Affiliation as printed
III. Physikalisches Institut , RWTH Aachen University , D-52056 Aachen , Germany
Institute of Physics , University of Mainz , D-55099 Mainz , Germany
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Massachusetts Institute of Technology
Affiliation as printed
Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Southern University and Agricultural and Mechanical College
Affiliation as printed
Dept. of Physics , Southern University , Baton Rouge , LA 70813 , USA
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University of California, Berkeley
Affiliation as printed
Dept. of Physics , University of California , Berkeley , CA 94720 , USA
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