Abstract (eng)
At present antiproton-nucleus annihilation at rest is a process that is not well understood. Furthermore, the most commonly used simulation models such as Chiral Invariant Phase Space model (CHIPS) and Fritiof precompound model (FTFP) in GEANT4 and the peanut model in FLUKA were developed for high energy physics application and disagree with the scarce data. Therefore, a new project is being conducted at the ASACUSA-Cusp experiment at CERN to measure antiproton-nucleus annihilation for a representative set of nuclei, aiming to validate the existing nuclear models but to also reveal hitherto unknown features for most nuclei such as the total multiplicity of emitted pions. For this reason, a beam line for the transport of slow extracted antiprotons is being constructed. The design relies on bending and focusing elements, including an electrostatic quadrupole deflector and steering Einzel lenses. This thesis will present simulations of the full antiproton beam path, starting from the particle trap all the way to the annihilation target, which were carried out using SIMION simulation software. The aim of these simulations is to achieve a design capable of a 90° bend, creating a beam with a diameter smaller than the target foil, and with minimal transmission losses. The optimization of the geometry and the applied voltages was achieved using a combination of several methods, such as geometry sweeps and the the Nelder-Mead method.