Contribution to a book

Detecting so called PeVatrons is considered one of the prime goals of $γ$-ray astronomy. PeVatrons are astrophysical objects in the Galaxy that are sources of cosmic rays exceeding PeV ($10^{15}$ eV) energies, the highest in our Galaxy. [...]

Neural network surrogates have been shown to decrease computational costs of simulations, but often at the risk of unreliable predictions. This work integrates and evaluates multiple epistemic uncertainty quantification methods for a reproduced convolutional autoencoder–recurrent neural network surrogate architecture for molecular data in a coupled spatiotemporal molecular-continuum flow prediction. [...]

In the past two decades, radio-frequency (RF) controls have improved by two orders of magnitude achieving meanwhile sub-10 fs phase stabilities and 0.01 % amplitude precision. Analog-to-digital-converters (ADCs) are the main limitation for further increase in detector resolution. [...]

Optical Cherenkov Radiation (ChR) is a well-known type of radiation, which is utilized in different fields of physics such as charged particle detection or generation of intense THz radiation. It is also widely used in beam diagnostics, for instance, in beam loss monitors or for bunch length measurements. [...]

FLASH, the XUV and soft X-ray free-electron laser at DESY, is currently undergoing the 2nd of two long upgrade shutdowns within the FLASH2020+ project. The 1st half of 2024 was dedicated to user operation. [...]

Modern high-performance computing centers increasingly opt for heterogeneous system designs, integrating general-purpose computing cores with accelerators, to deliver high computing performance and high efficiency. Scientific computing codes need to adapt to this change in cluster architecture, which introduces the challenge of hardware portability. [...]

Various methods to measure the dynamic behavior of particles require the calculation of autocorrelation functions. For this purpose, fast multi-tau correlators have been developed in dedicated hardware, in software, and on FPGAs. [...]