High-frequency longitudinal impedances, particularly at wavenumbers k≫ 1/σ z (where σ z
is the bunch length), can drive microwave instability and potentially limit the performance of …

Radio-frequency (RF) modulations can influence the microbunching instability (MBI)
dynamics and serve to eventually control them with reinforcement learning (RL) methods …

The concept of negative momentum compaction operation of synchrotron light sources is a
scarcely explored area in accelerator physics. The research in this thesis investigates the …

In the case of single-digit picosecond bunch length, synchrotron light sources produce
intense coherent radiation up to the THz range. The reduction of the bunch length by …

The study and understanding of collective effects plays a vital role for fourth-generation light
sources. These effects mostly need to be mitigated and controlled to achieve the design …

The longitudinal dynamics of a bunched electron beam is an important aspect in the study of
existing and the development of new electron storage rings. The dynamics depend on …

Coherent synchrotron radiation (CSR) is emitted when the emitting structure is equal to or
smaller than the observed wavelength. Consequently, these pulses are very short and most …

Abstract The Karlsruhe Research Accelerator (KARA), the storage ring at KIT, allows short
electron bunch operation with positive as well as negative momentum compaction factor. For …