Ph.D. Theses

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2017-12-12
13:28
[PUBDB-2017-13333] Dissertation / PhD Thesis

Particle-in-Cell Simulations of PerpendicularSupernova Shock Fronts
96 p. (2015) = Dissertation, Universität Potsdam, 2015
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2017-12-12
12:43
[PUBDB-2017-13327] Dissertation / PhD Thesis

Über die Anisotropie der kosmischen Strahlung
ca. 100 p. (2016) = Dissertation, Universität Potsdam, 2016

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2017-12-12
12:31
OpenAccess [PUBDB-2017-13325] Dissertation / PhD Thesis
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A catalog of variable high-energy gamma-ray sources and prospects for polarization measurement with the Fermi Large Area Telescope
Humboldt-Universität zu Berlin, 159 pp. (2017) [10.18452/18596] = Dissertation, Humboldt-Universität zu Berlin, 2017  GO
Das Fermi Large Area Telescope (LAT) ist ein satellitengestütztes Gammastrahlungs-Teleskop zur Messung von Gammastrahlung im Energiebereich zwischen ∼ 30 MeV und mehreren hundert GeV. Der Nachweis extraterrestrischer Gammastrahlung in diesem Energiebereich erlaubt Rückschlüsse auf die astrophysikalischen Quellen der Gammastrahlung und Beschleunigungsmechanismen kosmischer Strahlung mit Energien zwischen 1 GeV und ∼ 10 TeV. [...]
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2017-12-12
12:21
OpenAccess [PUBDB-2017-13323] Dissertation / PhD Thesis
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Prospects for Galactic dark matter searches with the Cherenkov Telescope Array (CTA)
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 290 p. (2017) [10.18452/17766] = Dissertation, Humboldt-Universität zu Berlin, 2017  GO
Die vorliegende Arbeit beschreibt einen semi-analytischen Ansatz zur Modellierung der Dichteverteilung von DM im Galaktischen Halo. Aus den verschiedenen Substrukturmodellen wird die γ-Strahlungsintensität, welche die Erde erreicht, berechnet. [...]
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2017-12-12
11:28
OpenAccess [PUBDB-2017-13314] Dissertation / PhD Thesis
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High-sensitivity analysis of the Cygnus region observed with VERITAS
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 193 pp. (2017) [10.18452/17750] = Dissertation, Humboldt-Universität zu Berlin, 2017  GO
Teilchenschauer können sowohl durch Photonen als auch durch geladene Teilchen erzeugt werden. Letztere kommen etwa 1000-mal häufiger vor als die durch Photonen erzeugten Teilchenschauer. [...]
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2017-12-12
11:04
OpenAccess [PUBDB-2017-13311] Dissertation / PhD Thesis
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Measurement of the iron spectrum in cosmic rays with the VERITAS experiment
Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 191 pp. (2017) [10.18452/17691] = Dissertation, Humboldt-Universität zu Berlin, 2017  GO
Das Energiespektrum der kosmischen Strahlung bietet wichtige Hinweise auf ihren Ursprung und ihre Ausbreitung. Verschiedene Messtechniken müssen kombiniert werden, um den ganzen Energiebereich abdecken zu können: Direkte Messungen mit Teilchendetektoren bei niedrigen Energien sowie indirekte Messungen von Luftschauern bei hohen Energien. [...]
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2017-12-07
15:47
OpenAccess [PUBDB-2017-12913] Dissertation / PhD Thesis
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Strukturuntersuchungen an Flüssigkeitsgrenzflächen mittels Röntgenstreumethoden
Kiel : Unibersitätsbibliothek Kiel, 159 pp. (2017) [10.3204/PUBDB-2017-12913] = Dissertation, Kiel University, 2017  GO
Structural studies of liquid interfaces were performed using X-ray diffraction and X-ray reflectivity methods.The kinetics of the potential dependent growth of a crystalline PbBrF structure at the interface between a liquid mercury electrode and an aqueous electrolyte solution containing Br-, F- and Pb2+ were studied in situ by a combination of time-resolved X-ray diffraction and electrochemical methods.These measurements confirm the known reversible formation of a PbBrF monolayer at potentials positive of the lead (de)amalgamation equilibrium potential. The formation of PbBrF is driven by the oversaturation of the solution close to the interface due to a high Pb2+ concentration, which is a result of the lead deamalgamation.The rate of the monolayer formation increases with more positive potentials.The monolayer formation is followed by the quasi-epitaxial growth of a three-dimensional PbBrF phase. [...]
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2017-12-04
13:28
OpenAccess [PUBDB-2017-12739] Book/Report/Dissertation / PhD Thesis
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Micro-channel Cooling for Silicon Detectors
[DESY-THESIS-2017-046]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS, 130 pp. (2018) [10.3204/PUBDB-2017-12739] = Dissertation, Universität Hamburg, 2017  GO
Silicon tracking detectors employed in high-energy physics are located very close to the interactionpoints of the colliding particle beams. The high energetic radiation emerging from the interactioninduces defects into the silicon, downgrading the efficiency to collect the charges created by passingparticles and increasing the noise while data taking. [...]
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2017-11-28
12:36
OpenAccess [PUBDB-2017-12442] Report/Dissertation / PhD Thesis
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Ultrafast X-ray Spectroscopies of Transition Metal Complexes Relevant for Catalysis
[XFEL.EU THESIS-2017-002]
207 pp. (2017) [10.3204/PUBDB-2017-12442] = Dissertation, University of Hamburg, 2017  GO
Transition metal (TM) complexes are ubiquitous in both technological and biological catalytic systems. For a detailed understanding of their reactivity, a knowledge of the fundamental processes during chemical reactions is crucial. [...]
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2017-11-28
11:07
OpenAccess [PUBDB-2017-12426] Dissertation / PhD Thesis
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Modulated phases in organic molecular crystals
Bayreuth : University of Bayreuth, 160 pp. (2017) [10.3204/PUBDB-2017-12426] = Dissertation, University of Bayreuth, 2017  GO
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