Ph.D. Theses

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2020-02-11
15:53
[PUBDB-2020-00684] Book/Dissertation / PhD Thesis

High-resolution grating-based phase-contrast imaging for synchrotron radiation sources
na () = Dissertation, University of Hamburg, 2019
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2020-01-27
15:52
OpenAccess [PUBDB-2020-00563] Dissertation / PhD Thesis

Investigations on the Capabilities of THz Production at the PITZ Facility
145 pp. () [10.3204/PUBDB-2020-00563] = Dissertation, Universität Hamburg, 2020  GO
The European XFEL has planned to perform pump-probe experiments by using its x-ray pulses and THz pulses. A promising concept to provide the THz pulses is to generate them using a tunable high-power accelerator-based THz source. [...]
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2020-01-17
16:30
OpenAccess [PUBDB-2020-00397] Dissertation / PhD Thesis

Eta Carinae detection and characterisation of the first colliding-wind binary in very-high-energy gamma-rays with H.E.S.S.Eta Carinae Detektion und Charakterisierung des ersten Binärsternsystems mit kollidierenden Sternwinden in sehr hoch-energetischer Gammastrahlung mit H.E.S.S.
Universität Potsdam 128 pp. () [10.25932/PUBLISHUP-42814] = Dissertation, University Potsdam, 2019  GO
Das außergewöhnliche Doppelsternsystem Eta Carinae fasziniert WissenschaftlerInnen und BeobachterInnen auf der südlichen Erdhalbkugel seit hunderten Jahren. Nach einem Supernova-ähnlichem Ausbruch war Eta Carinae zeitweise der hellste Stern am Nachthimmel. [...]
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2020-01-14
13:26
OpenAccess [PUBDB-2020-00203] Book/Report/Dissertation / PhD Thesis
et al
Top Quark Spin and Polarization Properties in Searches for New Phenomena with the CMS Detector at the LHC
[DESY-THESIS-2020-001]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 283 pp. () [10.3204/PUBDB-2020-00203] = Dissertation, Universität Hamburg, 2019  GO
In this work, a search for heavy pseudoscalar and scalar (A/H) Higgs bosons decaying to top-anti-top quark pairs (t ̄t) and a measurement of top quark polarization and t ̄t spin correlation are presented, performed using 35.9 /fb of data recorded by the CMS experiment in 2016. The dileptonic t ̄t final state is investigated in both analyses.The A/H Higgs boson search exploits the 2-dimensional spectrum of t ̄t invariant mass and an angular observable sensitive to both the spin and parity of the t ̄t system. [...]
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2019-12-30
14:54
[PUBDB-2019-05685] Dissertation / PhD Thesis

Synthesis and characterisation of $MnWO_{4}$-type multiferroic solid solutions: $In_{2x□x}Mn_{(1-3x)}WO_{4}$ and $In_{x}Na_{x}Mn_{1-2x}WO_{4}$
1-99 () = Dissertation, Ludwig-Maximilians-Univ. München, 2016
he present work is the first study on structural and magnetic effects of aliovalent substitution on MnWO4. The new solid solutions In2x□xMn1-3xWO4 (x ≤ 0.11; □ = vacancy) and InxNaxMn1-2xWO4 (x ≤ 0.26) were synthesised from solid state reaction and high temperature solution growth (HTSG), respectively. [...]

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2019-12-29
17:36
OpenAccess [PUBDB-2019-05675] Dissertation / PhD Thesis

Reaction mechanism study of vanadium pentoxide as cathode material for beyond-Li energy storage via in operando techniques
Karlsruhe XVII, 114 S. () [10.5445/IR/1000095719] = Dissertation, Karlsruhe Institute of Technology (KIT), 2019  GO
Die vorliegende Arbeit beschäftigt sich mit der Untersuchung des Ionenspeichermechanismus in V2O5-Kathodenmaterial. Insbesondere wurde die Speicherung von Mg2+, K+ und Zn2+ mit in operando-Synchrotronbeugung und in operando Röntgenabsorptionsspektroskopie in Kombination mit ex situ Raman und Röntgenphotoelektronenspektroskopie (XPS) oder Transmissionselektronenmikroskopie (TEM) untersucht. [...]
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2019-12-20
10:09
OpenAccess [PUBDB-2019-05614] Dissertation / PhD Thesis

Cross-section measurement of top quark pair production with additional b-jets in the eμ channel at √ s = 13 TeV with the ATLAS detector
Humboldt-Universität zu Berlin 199 pages () [10.18452/20757] = Dissertation, Humboldt-Universität zu Berlin, 2019  GO
Diese Doktorarbeit behandelt die Messung des Wirkungsquerschnittes der Paarbildung von Top-Quarks mit zusätzlichen B-Jets (Teilchenschauer aus der Fragmentierung von B-Quarks) in Proton-Proton-Kollisionen bei einer Schwerpunktsenergie von √s =13 TeV am Large Hadron Collider. Der Datensatz wurde 2015/16 mit dem ATLAS-Detektor aufgezeichnet und entspricht einer integrierten Luminosität von 36,1/fb. [...]
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2019-12-19
12:01
OpenAccess [PUBDB-2019-05524] Book/Report/Dissertation / PhD Thesis
et al
Investigation of low-energy photoelectron dynamics accelerated in terahertz light fields using a novel Velocity-Map-Imaging spectrometer
[DESY-THESIS-2019-033]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 155 pp. () [10.3204/PUBDB-2019-05524] = Dissertation, Universität Hamburg, 2019  GO
In this work, the dynamics of low-energy photoelectrons, generated by multiphoton ionization from near-infrared (NIR) laser pulses, in the presence of intense near single-cycle carrier-envelope phase stable Terahertz (THz) pulses, were experimentally investigated. For certain time delays between the NIR and THz pulses, a strong modulation of the photoelectron momentum distribution was observed and attributed to rescattering from the ionic core. [...]
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2019-12-12
23:17
[PUBDB-2019-05162] Dissertation / PhD Thesis

Experimental study of Perovskite / post-Perovskite phase transformation mechanism and its kinetics in the earth mantle
1-240 () = Dissertation, Université de Lille, 2017
The radial seismic structure of the earth is marked by a sharp transition about 200 km above the core-mantle boundary. This defines the top of the region called the D'' layer [...]

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2019-12-12
15:23
OpenAccess [PUBDB-2019-05119] Dissertation / PhD Thesis

Investigation of the pH and temperature dependent properties of tetramyristoyl cardiolipin and its behavior in model membranes
1 - 175 () [10.3204/PUBDB-2019-05119] = Dissertation, University of Greifswald, 2019  GO
The goal of this thesis was to characterize the properties of tetramyristoyl cardiolipin (TMCL) and several environmental influences on it. This included investigating the pH and temperature dependency of TMCL as well as the influences of ROS on TMCL and exam-ining the lipid-protein interactions between TMCL and cytc. [...]
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