Contribution to a book

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. [...]

This paper addresses the mode switching problem in piecewise smooth implicit multilinear initial value problems (IVPs), which are relevant for modeling hybrid dynamical systems like HVAC and power systems. Unlike traditional switched systems with explicit mode descriptions, this work focuses on systems where mode information is implicitly encoded in binary-valued variables and switching conditions are defined by inequality constraints. [...]

We present the recent progress and preliminary results of a sub-millijoule terahertz (THz) driven electron gun. 36keV maximum acceleration energy is achieved in the experiment [...]

We present novels methods aiming at recording THz waveforms in single-shot and high repetition rates, with high temporal resolution. This work is performed in the PhLAM-DESY collaboration framework, aiming at developing real-time diagnostics for THz sources, as well as monitoring the shapes of relativistic electron bunches in accelerators. [...]

An algorithm for calculating the radiation field of a charged point particle performing a helical motion in an infinite cylindrical waveguide with a multilayer side wall is found. The number of layers and their filling is arbitrary. [...]

Developments on high power tunable THz source forpump-probe experiments at the European XFEL are ongoing atthe Photo Injector Test facility at DESY in Zeuthen (PITZ). ALCLS-I undulator is used for proof-of-principle experiments atPITZ. [...]

We present a coupled-mode pumping strategy that overcomes the long-standing trade-off between conversion efficiency and optical bandwidth in soliton microcombs. Using this approach, we experimentally demonstrate an octave-spanning single soliton microcomb that achieves nearly 50% pump-to-comb conversion efficiency..