The PUMA experiment at CERN utilizes antiprotons to investigate the surface structure of radioactive nuclei. Since transporting these antiprotons is critical, precise control of the antiproton plasma is essential, and a dedicated test trap is operated at TU Darmstadt.

In this Master thesis, the candidate simulates, characterizes and installs an expansion of the PUMA test trap beam line. Thereby, it will be possible to load the trap with electrons, ions and negative ions. The latter will be commissioned and is of special interest, as the efficient cooling of antiprotons by electrons can be studied using negative ions. The goal is to minimize the number of electrons while preserving an efficient cooling. To achieve this, overlapping different types of plasmas by using an axial drive will be investigated.