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Thèses sur le sujet « Icecore »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Santanam, Suresh. "A trend study of atmospheric methane : 1965-81 GC and polar icecore measurements /." Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,168.

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2

GARZONIO, ROBERTO. "Modelling the suitability for ice core drilling of mountain glaciers and development of new spectroscopy systems for cold room laboratory and environmental monitoring." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2016. http://hdl.handle.net/10281/102667.

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I ghiacciai montani sono importanti fonti di dati paleoclimatici, essenziali allo studio dei cambiamenti climatici e ambientali. L'aumento della fusione dei ghiacciai sta portando alla perdita di preziose informazioni utili a predire l’evoluzione del clima. In questo contesto, è fondamentale definire le linee guida e creare mappe per l’identificazione delle aree idonee ad essere perforate. Nel primo anno di dottorato, ho definito l’idoneità di un ghiacciaio alla perforazione (SICD) come la probabilità di estrarre un campione di ghiaccio che possiede una stratigrafia ben conservata, utile alla

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3

Silverwood, Hamish George Miles. "Supersymmetric Dark Matter in IceCube." Thesis, University of Canterbury. Physics and Astronomy, 2012. http://hdl.handle.net/10092/6927.

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The Minimally Supersymmetric Standard Model (MSSM) provides us with a WIMP dark matter candidate particle, the neutralino. Neutralinos from the dark matter halo can potentially become captured by the sun and concentrated in the core, where they can undergo self-annihilation and so produce a distinct neutrino signal. The IceCube Neutrino Observatory has the potential to detect this neutrino signal and thus give indirect evidence of the presence and properties of neutralino dark matter. Although the full, unconstrained MSSM has 105 parameters this can be reduced to 25 parameters by the applicati

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4

Stachurska, Juliana. "Astrophysical Tau Neutrinos in IceCube." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21611.

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Das IceCube Neutrino Observatorium am Südpol hat die Existenz eines diffusen astrophysikalischen Neutrinoflusses nachgewiesen. Die Flavor-Zusammensetzung astrophysikalischer Neutrinos trägt Informationen über Orte kosmischer Teilchenbeschleunigung und Auswirkungen potenzieller neuer Physik auf die Neutrinoausbreitung. Zur seiner Bestimmung ist die Beobachtung von Tau-Neutrinos nötig. Ab einer Energie von ~O(100 TeV) kann deren Wechselwirkung über geladene Ströme eine Doppelkaskaden-Topologie ergeben, bei der die zwei Energiedepositionen am Tau-Entstehungs- und Tau-Zerfallsvertex aufgelöst werd

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5

Wren, Steven. "Neutrino mass ordering studies with IceCube-DeepCore." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/neutrino-mass-ordering-studies-with-icecubedeepcore(70414fde-3bef-4028-877b-5e1e86b2165d).html.

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The IceCube Neutrino Observatory at the South Pole is the world's largest neutrino detector with over 1km^3 of instrumented Antarctic ice. While it has been primarily designed to observe astrophysical neutrinos, this size also allows it to collect vast quantities of atmospheric neutrinos. These high-statistics datasets allow for measurements of the properties of neutrinos, in particular the phenomena of neutrino oscillation. One of the outstanding questions in this field is that of the neutrino mass ordering (NMO). The Precision IceCube Next Generation Upgrade (PINGU) is a proposed low-energy

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6

Stachurska, Juliana [Verfasser]. "Astrophysical Tau Neutrinos in IceCube / Juliana Stachurska." Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1216876991/34.

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7

Hickford, Stephanie Virginia. "Simulation of Cascades for the IceCube Neutrino Telescope." Thesis, University of Canterbury. Physics and Astronomy, 2007. http://hdl.handle.net/10092/1427.

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Neutrino telescopes open a new observational window on the universe. Neutrino interactions in these detectors can give rise to a combination of electromagnetic cascades, hadronic cascades and long range muons. Cerenkov radiation from these products is detected by the neutrino telescope. In this thesis the observational signatures associated with various neutrino-nucleon interaction products are investigated. Cerenkov radiation is emitted at a distinctive angle, about 40o in ice. The maximum number of optical photons that can be produced per unit charged tracklength is calculated to be 562 phot

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8

Hickford, Stephanie Virginia. "A Cascade Analysis for the IceCube Neutrino Telescope." Thesis, University of Canterbury. Physics and Astronomy, 2012. http://hdl.handle.net/10092/10014.

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IceCube is the largest operating neutrino observatory. An array of photomultiplier tubes deployed throughout a cubic kilometre of the Antarctic ice at the South Pole detect the Cherenkov radiation from neutrino-nucleon interactions. IceCube is capable of detecting neutrinos over a large energy range. The physics manifesto includes dark matter searches, cosmic ray observation, all sky point source searches, and particle physics parameter constraints. Astrophysical neutrinos are expected to originate from hadronic interactions in some of the most energetic regions in the Universe. The detection

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9

McCartin, Joseph William. "Cascade Reconstruction Analysis with the IceCube Neutrino Detector." Thesis, University of Canterbury. Physics and Astronomy, 2009. http://hdl.handle.net/10092/2609.

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A study into the reconstruction of cascade like events in the IceCube neutrino detector was performed by utilizing in-situ flasher devices. Reconstruction analysis was done with two different flasher settings at each optical module on string 63 at varying depths in the ice. Three different reconstruction algorithms were used to estimate the characteristics of these cascade type events. The characteristics included the estimated vertex position, and the number of photons produced by each flasher. The number of photons produced can be related to the energy for the cascade event via the detailed

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10

Daughhetee, Jacob D. "Search for neutrino transients using IceCube and DeepCore." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53462.

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Observations indicate that there is a correlation between long duration gamma-ray bursts (GRBs) and core-collapse supernovae (SNe). The leading model for GRB production assumes that relativistic jets are generated by the core-collapse within the progenitor star. Charged particles undergo Fermi-acceleration within internal shocks of these jets and subsequently give rise to gamma ray emission once the jets breach the surrounding stellar envelope. Very few SNe result in the occurrence of GRBs, however, it has been suggested that a significant fraction of core-collapse SNe manage to produce mildly

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11

Casey, James David. "Search for high energy GRB neutrinos in IceCube." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53839.

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The IceCube Neutrino Observatory has reported the observation of 35 neutrino events above 30 TeV with evidence for an astrophysical neutrino flux using data collected from May 2010 to May 2013. These events provide the first high-energy astrophysical neutrino flux ever observed. The sources of these events are currently unknown. IceCube has looked for correlations between these events and a list of TeV photon sources including a catalog of 36 galactic sources and 42 extragalactic sources, correlations with the galactic plane and center, and spatial and temporal clustering. These searches hav

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12

Raab, Christoph. "Searches for Neutrino Emission from Blazar Flares with IceCube." Doctoral thesis, Universite Libre de Bruxelles, 2021. https://dipot.ulb.ac.be/dspace/bitstream/2013/325215/3/toc.pdf.

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Cosmic rays reach Earth from beyond the Milky Way and with energies up to 10^20 eV.The responsible accelerators have to date not been discovered. However, multi-messenger astronomy can shed light on the question, based on the principle that protons and nuclei accelerated in dense and energetic environments would also produce gamma rays and neutrinos. Such environments may be found in "blazars", which are therefore cosmic ray accelerator candidates. Their gamma-ray emission has been observed to increase, sometimes by orders of magnitude, during "flares" as observed in light curves taken by the

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13

O'Rourke, Brogan Roisín. "AGN Candidates for High Energy Neutrino Emission in IceCube." Thesis, Uppsala universitet, Högenergifysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-409739.

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Since the construction of the IceCube Neutrino Observatory was completed in 2010, many amazing discoveries have been made in the field of neutrino physics. Recently a neutrino event has been linked to an blazar-type active galactic nucleus source, bringing us one step closer to understanding the production of high-energy extragalactic neutrinos and ushering in a new era of multimessenger astronomy. This was found by linking the neutrino event to one of the Fermi Collaboration’s gamma ray sources which had a blazar counterpart. The quest to link other neutrino events to AGN (active galactic nuc

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14

Middell, Eike. "Search for neutrino-induced particle showers with IceCube-40." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17227.

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Das IceCube-Experiment sucht nach astrophysikalischen, hochenergetischen Neutrinos, von deren Entdeckung man sich Antworten auf die seit mehr als 100 Jahren offene Frage nach dem Ursprung der kosmischen Strahlung erhofft. Zu diesem Zweck wurde ein kubikkilometergroßes Volumen tief im Antarktischen Eisschild mit optischen Sensoren instrumentiert, um die in Neutrinowechselwirkungen entstandene Cherenkov-Strahlung nachzuweisen.Diese Dissertation beschreibt eine Suche nach neutrinoinduzierten Teilchenschauern in Daten, die von April 2008 bis Mai 2009 während der Konstruktionsphase von IceCube auf

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15

Renschler, Max [Verfasser], and R. [Akademischer Betreuer] Engel. "A Prototype Radio Detector for the IceCube Surface Enhancement = Ein Radio-Detektor Prototyp für die Erweiterung des IceCube Oberflächendetektors / Max Renschler ; Betreuer: R. Engel." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1203211929/34.

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16

Whitehead, Samuel Robert. "On the Properties of Ice at the IceCube Neutrino Telescope." Thesis, University of Canterbury. Physics and Astronomy, 2008. http://hdl.handle.net/10092/1529.

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The IceCube Neutrino Telescope is designed to detect high energy neutrinos with a large array of photomultiplier tubes placed deep within the Antarctic ice. The way that light propagates through the ice needs to be modelled accurately to enable the paths of charged particles to be reconstructed from the distribution of their Cerenkov radiation. Light travelling through even the purest of ice will undergo scattering and absorption processes, however the ice in which IceCube is embedded has optical properties that vary significantly with depth which need to be accurately modelled. Currently, sim

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17

Talbert, Ronald J. "From the LHC to IceCube : a melange of particle phenomenology." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:55a7a99c-1a7d-4e69-829d-22c25a32098e.

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Three topics in particle phenomenology are independently considered: (1) the flux of prompt atmospheric neutrinos at terrestrial observatories, (2) the resummation of dijet event shapes in Soft-Collinear Effective Theory, and (3) aspects of non-abelian discrete symmetries of flavour. The thesis thus decomposes into three chapters addressing each point in a self-contained way, including short introductions and concluding remarks. Regarding (1), we calculate the neutrino flux arising from the decay of charmed mesons produced in cosmic ray collisions in the atmosphere, with the charm cross-sectio

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18

Panknin, Sebastian. "Search for neutrino-induced cascade events in the IceCube detector." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2011. http://dx.doi.org/10.18452/16397.

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Diese Arbeit präsentiert Ergebnisse einer Suche nach einem diffusen Fluss hochenergetischer, extraterrestrischer Neutrinos. Solch ein Fluss wird von verschiedenen Modellen zur Entstehung kosmischer Strahlung vorhergesagt. In einem Neutrinodetektor wie IceCube stehen im wesentlichen zwei Signaturen zum Nachweis der Neutrinos zur Verfügung: Das spurartige Lichtsignal eines neutrinoinduzierten Myons und das sphärische Lichtmuster eines neutrinoinduzierten Teilchenschauers, hier Kaskade genannt. Gesucht wurden neutrinoinduzierte Kaskaden mit Hilfe des IceCube-Neutrinodetektors. Die Date

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19

PALLADINO, ANDREA. "On the origin of high energy neutrinos detected by IceCube." Doctoral thesis, Gran Sasso Science Institute, 2017. http://hdl.handle.net/20.500.12571/9902.

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20

Huber, Thomas [Verfasser], and M. [Akademischer Betreuer] Weber. "IceScint : A Scintillation Detector Array for the IceCube IceTop Enhancement = IceScint: Ein Szintillationsdetektor-Feld für die Oberflächen-Erweiterung von IceCube / Thomas Huber ; Betreuer: M. Weber." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1232324019/34.

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21

Wernhoff, Carl. "An FPGA implementation of neutrino track detection for the IceCube telescope." Thesis, Linköping University, Computer Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57867.

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<p>The <em>IceCube telescope</em> is built within the ice at the geographical South Pole in the middle of the Antarctica continent. The purpose of the telescope is to detect muon neutrinos, the muon neutrino being an elementary particle with minuscule mass coming from space.</p><p>The detector consists of some 5000 DOMs registering photon hits (light). A muon neutrino traveling through the detector might give rise to a track of photons making up a straight line, and by analyzing the hit output of the DOMs, looking for tracks, neutrinos and their direction can be detected.</p><p>When processing

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22

Wikström, Gustav. "A search for solar dark matter with the IceCube neutrino telescope." Doctoral thesis, Stockholms universitet, Fysikum, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-27352.

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Dark matter particles in the form of supersymmetric Weakly Interacting Massive Particles (WIMPs) could accumulate in the centre of the Sun because of gravitational trapping. Pair-wise annihilations of WIMPs could create standard model particles out of which neutrinos could reach the Earth. Data from the IceCube 22-string neutrino telescope have been searched for signals from dark matter annihilations in the Sun. Highly sophisticated analysis methods have been developed to discern signal neutrinos from the severe background of atmospheric particle showers. No signal has been found in a dataset

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23

Heereman, von Zuydtwyck David. "HitSpooling: an improvement for the supernova neutrino detection system in icecube." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209179.

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The IceCube Neutrino Observatory consists of a lattice of 5160 photomultiplier tubes (PMTs)<p>which monitor one cubic kilometer of deep Antarctic ice at the geographic South Pole.<p>IceCube was primarily designed to detect neutrinos of energies greater than O(100 GeV).<p>Due to subfreezing ice temperatures, the photomultipliers' dark noise rates are particularly<p>low which enables IceCube to search for neutrinos from galactic supernovae by detecting<p>bursts of MeV neutrinos emitted during the core collapse and for several seconds following.<p>For that purpose, a dedicated online supernova DA

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24

Pretz, John. "Detection of atmospheric muon neutrinos with the IceCube 9-String Detector." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/4163.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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25

Eberhardt, Benjamin [Verfasser]. "Supernovae with IceCube: direction and average neutrino energy determination / Benjamin Eberhardt." Mainz : Universitätsbibliothek Mainz, 2017. http://d-nb.info/1143568192/34.

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Pollmann, Anna Maria [Verfasser]. "Search for mildly relativistic Magnetic Monopoles with IceCube / Anna Maria Pollmann." Wuppertal : Universitätsbibliothek Wuppertal, 2016. http://d-nb.info/1120337178/34.

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27

Wolf, Martin. "Indirect Searches for Galactic Dark Matter with IceCube-DeepCore and PINGU." Licentiate thesis, Stockholms universitet, Fysikum, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-104786.

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The cubic-kilometer sized IceCube neutrino observatory is burieddeep in the glacial ice at the Earth’s South Pole. Its low-energyextension array DeepCore enables physicists to search indirectlyfor light Dark Matter (DM) particles with masses as low as tensof GeV/c2 situated within our home galaxy, the Milky Way. GeVneutrinos could be produced through DM particle annihilations,propagating to the Earth where they could be detected by IceCube. This licentiate thesis presents a search for Weakly Interacting Mas-sive Particles (WIMPs) with masses as low as 30 GeV/c2 in theGalactic center (GC) using

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Basto, Gonzalez Victor Saul 1977. "Procura de indícios de neutrinos estéreis nos experimentos IceCube e KATRIN." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276982.

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Orientador: Orlando Luis Goulart Peres<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-24T13:21:19Z (GMT). No. of bitstreams: 1 BastoGonzalez_VictorSaul_D.pdf: 37659795 bytes, checksum: f4492cea9594ac4fbffc288a0c46526a (MD5) Previous issue date: 2014<br>Resumo: Motivados pelos indícios experimentais da existência de um quarto neutrino, que surge nos dados de oscilações coletados nos experimentos de aparecimento e desaparecimento de neutrinos, e pela possibilidade teórica de explicar a pequena massa dos neutrino

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Olivo, Martino. "Neutrino emission from high-energy component gamma-ray bursts." Licentiate thesis, Uppsala universitet, Högenergifysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132961.

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Gamma-ray bursts (GRBs) are brief and sudden explosions radiating most of their energy in the soft γ-ray band ( 100 keV). In the context of multimessenger astroparticle physics recent observations of GRBs provide an excellent benchmark for testing theoretical models of high energy emission mechanisms. Acceleration of hadrons in the engine is expected to produce high energy neutrinos and gamma-rays simultaneously via π±/π0 decays, thus reinforcing the motivation for coincident searches in km3 neutrino telescopes. The Waxman-Bachall spectra and the corresponding expected neutrino rates in IceCub

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Kim, Kwang Seong. "Comparison of track reconstruction algorithms for the Moon Shadow Analysis in IceCube." Thesis, Uppsala universitet, Högenergifysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-201530.

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31

Engdegård, Olle. "A Search for Dark Matter in the Sun with AMANDA and IceCube." Doctoral thesis, Uppsala universitet, Högenergifysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160833.

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A search for weakly interacting massive particles (WIMPs) annihilating in the Sun was performed with the IceCube and AMANDA neutrino telescopes, using data from 2008 corresponding to 149 days of livetime. Assuming that particles in the dark matter halo scatter and accumulate in the centre of the Sun, Majorana WIMPs may pair-wise annihilate and give rise to a neutrino signal detectable in an experiment at Earth. No excess of muon-neutrinos from the Sun was observed, and limits on the νμ-flux were set for masses between 50 GeV and 5 TeV considering WIMPs annihilating into b‾b and W+W-. Separate

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32

Schatto, Kai [Verfasser]. "Stacked searches for high-energy neutrinos from blazars with IceCube / Kai Schatto." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1059431149/34.

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Kopper, Sandro [Verfasser]. "Search for Exotic Double Tracks with the IceCube Neutrino Telescope / Sandro Kopper." Wuppertal : Universitätsbibliothek Wuppertal, 2017. http://d-nb.info/1135602506/34.

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34

Wolf, Martin. "Indirect Searches for Dark Matter in the Milky Way with IceCube-DeepCore." Doctoral thesis, Stockholms universitet, Fysikum, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-128785.

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Many astronomical observations, including rotational curve measurements of stars and the analysis of the cosmic microwave background, suggest the existence of an invisible matter density content in the Universe, commonly called Dark Matter (DM). Possibly, DM could be of particle nature, where Weakly Interacting Massive Particles (WIMPs) could be a viable DM candidate. The cubic-kilometer sized IceCube neutrino observatory located at the Earth’s South Pole can search indirectly for the existence of DM by detecting neutrino signals from WIMP self-annihilation in the Galactic center (GC) and the

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Kintscher, Thomas. "Rapid Response to Extraordinary Events: Transient Neutrino Sources with the IceCube Experiment." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21948.

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Im Jahr 2013 ist es dem IceCube-Experiment gelungen, einen Fluss von Neutrinos extraterrestrischen Ursprungs nachzuweisen, und damit das Neutrino als weiteres kosmisches Botenteilchen zu etablieren. Die Frage nach dem Ursprung der Neutrinos, die einen komplementären Blick auf die Quellen bieten, kann möglicherweise die alte Frage nach dem Ursprung der kosmischen Strahlung lösen. Zeitunabhängige Suchen nach Neutrinoquellen konnten bisher keine einzelnen Kandidaten isolieren. Zeitlich veränderliche Quellen kommen daher als Ursprung in Betracht. IceCube ermöglicht es, kontinuierlich den gesamt

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Rongen, Martin [Verfasser], Christopher Henrik V. [Akademischer Betreuer] Wiebusch, and Oliver [Akademischer Betreuer] Pooth. "Calibration of the IceCube neutrino observatory / Martin Rongen ; Christopher Wiebusch, Oliver Pooth." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1211963640/34.

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Minarelli, Emma. "Confronto tra la direzione di arrivo dei neutrini di ANTARES e IceCube." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7713/.

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[Abstract]. Questo lavoro è finalizzato al confronto delle rivelazioni di canditati eventi di neutrino cosmico da parte di due esperimenti ANTARES ed ICECUBE. I due apparati, entrambi basati sulla rivelazione di radiazione Cherenkov generata da prodotti di interazione CC dei neutrini, si differenziano per la geometria del detector e per il mezzo in cui viene prodotta la radiazione, e hanno quindi sensibilità e risoluzione diverse. L'analisi dei dati è basata sulla rappresentazione delle direzioni di arrivo degli eventi su mappa celeste nei due sistemi di coordinate galattico ed equatoriale. La

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Rongen, Martin Verfasser], Christopher Henrik V. [Akademischer Betreuer] [Wiebusch, and Oliver [Akademischer Betreuer] Pooth. "Calibration of the IceCube neutrino observatory / Martin Rongen ; Christopher Wiebusch, Oliver Pooth." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1211963640/34.

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Garza, Juan Pablo Yáñez. "Measurement of neutrino oscillations in atmospheric neutrinos with the IceCube DeepCore detector." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2014. http://dx.doi.org/10.18452/17016.

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Neutrinooszillationen sind ein sehr aktives Forschungsfeld. In den letzten Jahrzehnten haben viele Experimente das Phänomen untersucht und sind inzwischen zu Präazisionsmessungen vorangeschritten. Mit seiner Niederenergieerweiterung DeepCore kann das IceCube-Experiment zu diesem Forschungsfeld beitragen. IceCube ist ein 1 km^3 großes Tscherenkow-Neutrino-Teleskop, welches das tiefe, antarktische Eis des Südpols als optisches Medium nutzt. DeepCore ist eine Erweiterung mit dichterer Instrumentierung im unteren Teil des IceCube-Teleskops. Diese dichte Instrumentierung ermöglicht den Nachweis

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Voigt, Bernhard. "Sensitivity of the IceCube detector for ultra-high energy electron-neutrino events." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15850.

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Zur Zeit wird das IceCube Neutrino-Teleskop am Südpol im Eis der Antarktis installiert, die Hälfte des Detektors ist bereits im Betrieb. Bei Fertigstellung im Jahr 2011 wird mehr als 1 km^3 Eis mit Photovervielfachern instrumentiert sein. IceCube bietet damit eine einzigartige Möglichkeit, die Quellen der kosmischen Strahlung mit Hilfe hochenergetischer Neutrinos zu finden. Im Rahmen dieser Arbeit wurde die Sensitivität des kompletten Icecube Detektors für den Nachweis eines diffusen Flusses von Elektronneutrinos bestimmt. Ziel war es, die Eigenschaften des Detektors für Energien

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Alba, José Luis Bazo. "Search for steady and flaring astrophysical neutrino point sources with the IceCube detector." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16240.

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Für astrophysikalische Quellen, z.B. aktive galaktische Kerne, werden hochenergetische Neutrinoflüsse vorhergesagt. Neutrinos und Gammastrahlen werden in hadronischen Prozessen erzeugt, für die Protonen auf hohe Energien beschleunigt werden müssen. Da Neutrinos nur schwach wechselwirken und nicht von Magnetfeldern abgelenkt werden können, bleiben Flussstärken und ihre Richtung erhalten. IceCube, ein Kubikkilometer-Detektor der sich am Südpol befindet, kann solche Neutrinos nachweisen. In dieser Arbeit wurden Daten zweier Teilkonfigurationen IceCubes (22 und 40 Trossen) ausgewertet. Die Daten,

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Stößl, Johannes Achim. "A search for particle showers at the edge of IceCube’s instrumented volume." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18124.

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Unter den Methoden zur Suche nach Neutrino Ereignissen in IceCube versprechen Suchen nach Teilchenschauern, sogenannten Kaskaden eine gute Energieauflösung und einen verhätlnismässig geringen atmosphärischen Untergrund. Dadurch erreichen solche Suchen eine hohe Sensitivität für einen extraterrestrischen Neutrino Fluss. Bisher beschränkte sich die Suche nach solchen Ereignissen auf solche in einer inneren Region des IceCube Detektors. Das Detektorvolumen am Rand wurde bisher benutzt um den Untergrund von einfallenden atmosphärischen Muonen zu Unterdrücken. Diese Dissertation präsentiert eine

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Lauer, Robert Johannes. "Extending the search for cosmic point sources of neutrinos with IceCube beyond PeV energies and above the horizon." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16177.

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Die Suche nach Neutrino-Punktquellen bietet eine Möglichkeit, astrophysikalische Teilchenbeschleuniger als Quellen der Kosmischen Strahlung zu identifizieren. Eine etablierte Methode in der Neutrinoastronomie ist die Messung der Tscherenkow-Strahlung induzierter Myonen in unterirdischen Detektoren. Die hier vorgestellte Analyse basiert auf Daten, die zwischen 2007 und 2008 mit IceCube, dem größten Neutrinoteleskop dieser Art, gesammelt wurden. Bisherige Neutrino-Punktquellensuchen waren auf eine Hemisphäre beschränkt gewesen, da nur aufwärts laufende Ereignisse betrachtet wurden, um den atmos

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Mohrmann, Lars. "Characterizing cosmic neutrino sources." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17377.

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Das IceCube Neutrino Observatorium ist ein km^3-großes Neutrinoteleskop und befindet sich am geographischen Südpol. Das Ziel des Experiments ist es, kosmische Neutrinos nachzuweisen. Es wird erwartet, dass solche Neutrinos in Wechselwirkungen von hochenergetischer kosmischer Strahlung mit Materie oder Photonen in der Nähe ihrer Beschleunigungsumgebung entstehen. Der erste Nachweis für einen Fluss von kosmischen Neutrinos wurde von der IceCube-Kollaboration erbracht. Der Ursprung des Flusses ist noch nicht bekannt, dennoch können die Eigenschaften der Quellen durch eine Messung des Energiespe

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Klepser, Stefan. "Reconstruction of extensive air showers and measurement of the cosmic ray energy spectrum in the range of 1 - 80 PeV at the South Pole." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2008. http://dx.doi.org/10.18452/15790.

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IceTop ist ein Detektorfeld fuer kosmische Strahlung, das momentan am Suedpol errichtet wird. Es ist Teil des IceCube-Observatoriums und wird nach Fertigstellung eine Flaeche von 1km^2 ueberspannen. Es zielt auf den Nachweis von Teilchenkaskaden ab, die von kosmischer Strahlung mit Energien im PeV-Bereich induziert werden. Die Dissertation beinhaltet die erste Analyse hochenergetischer kosmischer Strahlung mit IceTop. Zunaechst wird hierfuer die Lichtausbeute der Detektortanks untersucht. Dies ermoeglicht die Erstellung einer Erwartungswertverteilung der Schauersignale, und eines

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Johansson, Henrik. "Searching for an Ultra High-Energy Diffuse Flux of Extraterrestrial Neutrinos with IceCube 40." Doctoral thesis, Stockholms universitet, Fysikum, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-57169.

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Neutrino astronomy has the potential to greatly improve our understanding of the high-energy universe. An unresolved, diffuse, flux of neutrinos is sensitive to the properties of the population of cosmic accelerators in the universe. Data from 2008 and 2009 collected with the IceCube in-ice detector in a 40-string configuration were searched for an all-flavor ultra high-energy diffuse flux of astrophysical neutrinos. Data were divided into three streams based on signal and background event topology. Robustness was prioritized and a good agreement between real and simulated background data was

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Ström, Rickard. "Exploring the Universe Using Neutrinos : A Search for Point Sources in the Southern Hemisphere Using the IceCube Neutrino Observatory." Doctoral thesis, Uppsala universitet, Högenergifysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-265522.

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Neutrinos are the ideal cosmic messengers, and can be used to explore the most powerful accelerators in the Universe, in particular the mechanisms for producing and accelerating cosmic rays to incredible energies. By studying clustering of neutrino candidate events in the IceCube detector we can discover sites of hadronic acceleration. We present results on searches for point-like sources of astrophysical neutrinos located in the Southern hemisphere, at energies between 100 GeV and a few TeV. The data were collected during the first year of the completed 86-string detector, corresponding to a

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Euler, Sebastian [Verfasser]. "Observation of oscillations of atmospheric neutrinos with the IceCube Neutrino Observatory / Sebastian Euler." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1058238922/34.

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Bechet, Sabrina. "Recherche d'un flux diffus de neutrinos tauiques d'origine cosmique dans le détecteur IceCube." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209628.

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Le détecteur IceCube est constitué d'un réseau de modules optiques digitaux (DOMs) déployés sur un volume d'1 km³ dans la glace antarctique. Les DOMs enregistrent la lumière Cerenkov émise par les particules secondaires issues des interactions des neutrinos avec la glace. Selon la répartition géographique des signaux lumineux dans la glace, on peut différencier les différentes saveurs de leptons et ainsi identifier la saveur du neutrino primaire. Les modèles astrophysiques prédisent une production dominante de neutrinos électroniques et muoniques au sein d'accélérateurs cosmiques. Cependant, l

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Kim, Kwang Seong. "Search for neutrino events from the Galactic Center region with the IceCube detector." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-207581.

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