Fakultät für Physik (inkl. GAUSS)
Recent Submissions
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Coherent attosecond electron microscopy
(2024-12-20)This work contributes to the development of time-resolved electron microscopy techniques for imaging optical excitations. Two articles, reprinted in this cumulative thesis, present novel measurement schemes that image the ... -
Measurement of the tt̄γ production cross section with the ATLAS experiment at √ s = 13 TeV using the full Run 2 data set
(2024-12-19)With Run 1 of the LHC, an unequalled top-quark factory started its operation. While during Run 1 the focus was on tt̄ measurements, the unprecedented size of the ATLAS Run 2 data set of 140 fb −1 allows for precise ... -
Grenzflächen- und Verspannungseffekte in La₁₋ₓSrₓMnO₃-Dünnschichten
(2024-12-19)In this dissertation, strain and interface effects on La₁₋ₓSrₓMnO₃ (LSMO) thin films with doping levels 0 ≤ x ≤ 0.6 are investigated by Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS). For undoped LaMnO₃, ... -
Towards a new view of the photospheric magnetic field with the Polarimetric and Helioseismic Imager on Solar Orbiter
(2024-12-19)Accurately determining the magnetic flux through the solar surface is incredibly important to understanding the dynamics of the Sun and its atmosphere. The magnetic field provides energy for heating the higher layers of ... -
Stochastic (thermo)dynamics of molecular coupled processes
(2024-12-18)Out of equilibrium biological processes are the key for life. From large animals to the smallest proteins, life is sustained by a continuous throughput of free energy. This happens through the exchange of some form of ... -
Modeling spectral and total solar irradiance variability from any vantage point in the Solar System
(2024-12-17)The Sun is the primary external energy source for all planets in the Solar System. Its radiative flux, known as solar irradiance, plays a crucial role in planetary atmosphere modeling. Accurate spectral solar irradiance ... -
Turbulence in convective boundary layers: a statistical investigation
(2024-12-12)A combination of vertical turbulent convection and shear-driven turbulence governs the convective boundary layers (CBLs), and the role of turbulence in CBL dynamics has yet to be fully understood. In this thesis, we aim ... -
Processes of structure formation in copolymer systems
(2024-11-15)Block copolymers exhibit complex properties, such as self-assembly capabilities and viscoelasticity, making them indispensable in various industries and scientific fields. Their ability to create ordered microscopic ... -
Bringing Order to the Framework: Nanoscale Charge Transport Characterization of MOFs and COFs
(2024-10-22)Reticular chemistry, the synthesis of highly ordered, porous, crystalline networks with a previously identified target structure, has given rise to various classes of open framework materials, including the best-known ... -
Structure and Kinematics of the Broad-Line Region in Selected Changing-Look AGN
(2024-10-18)In this thesis, the results of three variability studies conducted on three individual active galactic nuclei (AGN) are presented. Each of these AGN belongs to the class of changing-look (CL) AGN, which are characterized ... -
Inferring atomic line parameters from solar spectra
(2024-09-19)The proximity of the Earth to the Sun offers a unique opportunity to study different plasma phenomena that occur in its atmosphere, which are unattainable in plasma laboratories. Advances in the instruments used for solar ... -
Iterative helioseismic holography
(2024-08-28)The understanding of the solar interior, in particular the subsurface solar flows, is im- portant for understanding the solar activity cycle. Traditional local helioseismology does not use all the seismic information ... -
Investigation of boundary layer transition at high Reynolds numbers using time-resolved temperature-sensitive paint
(2024-08-23)Understanding the fundamental principles of the processes that lead to laminar-turbulent transition on aerodynamic surfaces is of significant importance to correctly describe, model and perhaps ultimately influence the ... -
Radio-frequency controlled low-energy electron pulses
(2024-08-23)Electron beams are invaluable for probing material structures and dynamic processes due to their large scattering cross sections and the versatility of tunable electron optics for diffraction and microscopy. Pulsed electron ... -
Investigation of Cells and Cellular Components with X-Rays in Liquid Sample Environments
(2024-08-07)Due to their short wavelength, X-rays offer a high spatial resolution and a high ability to penetrate soft condensed matter. Therefore, X-rays are well-suited for investigating structures and structural changes in in-vitro ... -
Self-Organization of Filamentous Cyanobacteria
(2024-07-29)Cyanobacteria are phototrophic prokaryotes that occur in almost any natural habitat on Earth, from polar to tropical climates, from the Archaean to the present. Roughly 2.5 billion years ago, they have generated the ... -
Collisional droplet growth in a turbulent environment
(2024-07-18)It is a long-standing problem to find the mechanisms how the onset of rain occurs as rapidly as observed in warm clouds. In the so-called size gap, where neither condensation nor gravitational settling can explain efficient ... -
Stellar Activity and Radial Velocities in M Dwarfs
(2024-07-17)Stellar activity is one of the principal obstacles to achieving sub 1 m/s radial velocity precision in exoplanet detection surveys. Understanding how stellar activity affects the stellar environment is crucial to mitigating ... -
Deep Learning Methods for the Analysis of Cardiac Function in Real-Time MRI
(2024-07-17)Magnetic resonance imaging (MRI) is an essential imaging modality in today's medical field and allows the visualization of soft tissue without the use of ionizing radiation. For cardiac magnetic resonance imaging (CMR), ... -
Measurement of the Branching Ratio $B \to D^{**} \ell \nu_{\ell}$ using the hadronic Full Event Interpretation with Belle II Data
(2024-07-17)The Belle II detector is situated at the asymmetric $e^{-}e^{+}$ collider SuperKEKB at KEK in Tsukuba in Japan, which operates with an energy slightly above the mass of the Y(4S) resonance. As a result, pairs of B mesons ...