Contributions to a conference proceedings

Laser welding was carried out in AISI304 (X5CrNi18-10) stainless steel using a multi-core fiber laser. High-speed X-ray imaging was used to monitor the process [...]

Achieving high-quality and high-aspect-ratio micro holes with ultrashort pulse laser percussion drilling remains a challenge. Lateral extensions or bulges in dependence on the polarization of the laser beam have so far only been observed by analyzing metallographically prepared cross-sections and the outlets of the holes [...]

The main objective of this work is to provide a basic understanding of the mechanisms and locations of defect formation during percussion laser drilling of microholes using ultrashort pulses.Through the application of high-speed synchrotron X-ray imaging, we have been able to observe the dynamic formation and evolution of these defects in real-time. Our findings indicate that the initial deviations in the borehole geometry are highly dependent on the applied laser fluence. [...]

Background and Aim: Full-thickness biopsies of the intestinal wall may be used tostudy and assess damage to the neurons of the enteric nervous system (ENS), that is,enteric neuropathy. The ENS is difficult to examine due to its localization deep in theintestinal wall and its organization with several connections in diverging directions.Histological sections used in clinical practice only visualize the sample in a twodimensional way. [...]

We extract the top-quark mass value in the on-shell renormalization scheme from the comparison of theoretical predictions for $pp \rightarrow t\bar{t} + X$ at next-to-next-to-leading order (NNLO) QCD accuracy with experimental data collected by the ATLAS and CMS collaborations for absolute total, normalized single-differential and double-differential cross-sections during Run 1, Run 2 and the ongoing Run 3 at the Large Hadron Collider (LHC). For the theory computations of heavy-quark pair-production we use the MATRIX framework, interfaced to PineAPPL for the generation of grids of theory predictions, which can be efficiently used a-posteriori during the fit, performed within xFitter. [...]

The comprehension of microhole formation during percussion drilling of metals using ultrashort laser pulses is still limited. The shape of a microhole can be impacted by factors like heat accumulation, the emergence of side channels, bending, and bulging. [...]

This work presents a study of recent advances in the understanding of the mechanismcontrolling chemical composition and the microstructure of reaction regions in a Ta/304L steelcomposite with and without Cu interlayers fabricated by explosive welding, both duringcomposite formation and post-processing annealing. The microstructure of solidified meltregions (SMR) were characterized using scanning and transmission electron microscopy whilephase composition by X-ray synchrotron radiation. [...]

The SASE3 Variable Polarization project is intended to offer polarization control of the X-ray FEL pulses at the European XFEL. The project was completed in early 2022. [...]

A-site order and disorder NdBaMn$_2$O$_6$ (NBMO) manganites have been prepared to reveal the crucial role of A-site cationic ordering on the thermal response of these systems. The samples were characterized and studied using XRD, temperature (T) dependent specific heat (C$_p$), and magnetic field (H) dependent magnetization (M) measurements. [...]