Master Theses

In the search for physics beyond the Standard Model, research in particle physics aims to probe particle interactions at high energies and strives for better precision on measurements. Experiments such as Belle II target higher luminosities to push the precision frontier. [...]

Before the successful detection of gravitational waves (GWs) with LIGO and VIRGO, superconductingradio frequency (SCRF) cavities were already considered as potential alternativesfor large laser interferometers. They are particularly suited to probe high frequencies above∼ 10 kHz by using a heterodyne approach where the GW has to be resonant with the frequencydifference of two cavity eigenmodes. [...]

he Atomic Pair Distribution Function (PDF) is the Fourier analysis of total scattering data including Bragg as well as diffuse scattering. Contrary to the conventional diffraction studies, which solely consider Bragg scattering contributions and thus only access to the long range ordering information, the PDF yields short and intermediate range ordering information [...]

Transition metal oxides are promising materials for photoanodes in devices for photoelectrochmical water splitting. TiO$_2$ was the first photoactive material used in an electrochemical cell in 1972 and recently also hematite ($\alpha$-Fe$_2$O$_3$) has drawn much attention [...]

The numerous advantages of filamentous fungal-pellets for the production of various products, such as citric acid, attract the attention of researchers and industrial engineers. In this regard, it is important to study the morphology of the fungal pellets, as it has a great impact on productivity. [...]

Cryo-Module Test Bench (CMTB) is a research facility to study particle accelerators equipped with Superconducting Radio Frequency (SRF) cavities and is currently used to perform studies on the Continuous Wave (CW) mode of operation of SRF linear accelerators. These studies aim to develop new technologies for the proposed CW upgrade of the European XFEL, the world’s largest superconducting linear accelerator used to produce X-Ray pulses for scientific purposes. [...]

The Phase II upgrade of the ATLAS detector will prepare it to handle the 2.5–fold increase in instantaneous luminosity of the High Luminosity LHC project starting in 2028. The upgrade will also involve the tracking sub-system of the ATLAS detector to be replaced by the Inner Tracker (ITk), which is made up of a closer-to-beam-line Pixel and a circumscribing Strip detector. [...]

The first goal of this thesis was to check whether the parameter variations of the 2HDM+a model,in the process of bbH$\to$Za$\to$ll$_{χχ}$, have an impact on multivariate methods. The second goalwas to check the feasibility of using a singular deep neural network trained on all given masspoints of the heavy Higgs and dark matter mediator.It was found that the variation of model parameters unrelated to mass of particles had no sig-nificant impact on the performance of multivariate methods. [...]

The FCC-hh is a proposed circular hadron collider at an energy of 100 TeV. Thetotal integrated luminosity is expected to be around 30 ab$^{−1}$. [...]