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Sensitivity of the IceCube detector for ultra-high energy electron neutrino events

Abstract

IceCube is a neutrino telescope currently under construction in the glacial ice at South Pole. At the moment half of the detector is installed, when completed it will instrument 1 km{sup 3} of ice providing a unique experimental setup to detect high energy neutrinos from astrophysical sources. In this work the sensitivity of the complete IceCube detector for a diffuse electron-neutrino flux is analyzed, with a focus on energies above 1 PeV. Emphasis is put on the correct simulation of the energy deposit of electromagnetic cascades from charged-current electron-neutrino interactions. Since existing parameterizations lack the description of suppression effects at high energies, a simulation of the energy deposit of electromagnetic cascades with energies above 1 PeV is developed, including cross sections which account for the LPM suppression of bremsstrahlung and pair creation. An attempt is made to reconstruct the direction of these elongated showers. The analysis presented here makes use of the full charge waveform recorded with the data acquisition system of the IceCube detector. It introduces new methods to discriminate efficiently between the background of atmospheric muons, including muon bundles, and cascade signal events from electron-neutrino interactions. Within one year of operation of the complete detector a sensitivity of  More>>
Authors:
Publication Date:
Jul 16, 2008
Product Type:
Thesis/Dissertation
Report Number:
INIS-DE-0641
Resource Relation:
Other Information: TH: Diss. (Dr.rer.nat.)
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SENSITIVITY; ELECTRON NEUTRINOS; TELESCOPES; ICE; SIMULATION; CASCADE SHOWERS; COSMIC MUONS; NEUTRINO DETECTION; COSMIC RAY DETECTION; COSMIC NEUTRINOS; PEV RANGE; ENERGY ABSORPTION; CHARGED-CURRENT INTERACTIONS; PARTICLE DISCRIMINATION; BACKGROUND RADIATION; MUON DETECTION; TEV RANGE 10-100; TEV RANGE 100-1000; CHERENKOV COUNTING; COSMIC RAY FLUX; ENERGY DEPENDENCE
OSTI ID:
21161765
Research Organizations:
Humboldt-Universitaet, Berlin (Germany). Mathematisch-Naturwissenschaftliche Fakultaet 1
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
TRN: DE09F4593
Availability:
Commercial reproduction prohibited; INIS; OSTI as DE21161765
Submitting Site:
DEN
Size:
144 pages
Announcement Date:
May 28, 2009

Citation Formats

Voigt, Bernhard. Sensitivity of the IceCube detector for ultra-high energy electron neutrino events. Germany: N. p., 2008. Web.
Voigt, Bernhard. Sensitivity of the IceCube detector for ultra-high energy electron neutrino events. Germany.
Voigt, Bernhard. 2008. "Sensitivity of the IceCube detector for ultra-high energy electron neutrino events." Germany.
@misc{etde_21161765,
title = {Sensitivity of the IceCube detector for ultra-high energy electron neutrino events}
author = {Voigt, Bernhard}
abstractNote = {IceCube is a neutrino telescope currently under construction in the glacial ice at South Pole. At the moment half of the detector is installed, when completed it will instrument 1 km{sup 3} of ice providing a unique experimental setup to detect high energy neutrinos from astrophysical sources. In this work the sensitivity of the complete IceCube detector for a diffuse electron-neutrino flux is analyzed, with a focus on energies above 1 PeV. Emphasis is put on the correct simulation of the energy deposit of electromagnetic cascades from charged-current electron-neutrino interactions. Since existing parameterizations lack the description of suppression effects at high energies, a simulation of the energy deposit of electromagnetic cascades with energies above 1 PeV is developed, including cross sections which account for the LPM suppression of bremsstrahlung and pair creation. An attempt is made to reconstruct the direction of these elongated showers. The analysis presented here makes use of the full charge waveform recorded with the data acquisition system of the IceCube detector. It introduces new methods to discriminate efficiently between the background of atmospheric muons, including muon bundles, and cascade signal events from electron-neutrino interactions. Within one year of operation of the complete detector a sensitivity of 1.5.10{sup -8}E{sup -2} GeVs{sup -1}sr{sup -1}cm{sup -2} is reached, which is valid for a diffuse electron neutrino flux proportional to E{sup -2} in the energy range from 16 TeV to 13 PeV. Sensitivity is defined as the upper limit that could be set in absence of a signal at 90% confidence level. Including all neutrino flavors in this analysis, an improvement of at least one order of magnitude is expected, reaching the anticipated performance of a diffuse muon analysis. (orig.)}
place = {Germany}
year = {2008}
month = {Jul}
}