Bachelor Theses

In simulating high-energy particle collisions, Monte Carlo event generatorsemploy different models to create parton showers and replicate hadronization.The choice of model can influence the final state of the simulation and,consequently, the subsequent analysis of the generated event. This study utilizeda machine learning algorithm to discern the differences between quark and gluonjets generated through different approaches to showering and hadronization.Initially, particle jets from dijet events generated using Pythia, Sherpa and Herwigwere compared across various jet- and particle-level properties. [...]

The Standard Model of particle physics has been highly successful in describing fundamental particles and their interactions, but potential extensions are needed to address itslimitations. Precise measurements of rare decays, such as the radiative B → Xsγ decay, provide an opportunity to test Beyond Standard Model (BSM) theories, due to them being suppressed by the Standard Model [...]

act The production of a Wboson in association with a charm quark is a valuable process to study the relatively unconstrained strange quark parton distribution function of the proton. This work presents an analysis of gluon splitting as an important but not well understood background process to W+c production. [...]

The PETRA IV project at DESY aims to upgrade the present synchrotron radiation sourcePETRA III into a source of ultra-low emittance with target emittance of 20pmrad. Thesmall beam emittance translates directly into much smaller beam sizes of about 7 μmhorizontally and 3 μm vertically at insertion device source points, thus imposing stringentrequirements on the machine’s stability. [...]

Bei der Bestrahlung von Tumoren findet unter anderem Elektronenstrahlung Anwendung.Ein noch weitgehend unerforschter und vielversprechender Effekt ist der sogenannteFLASH-Effekt, bei welchem eine kurzzeitige und hochdosierte Bestrahlung zu wenigerSch¨aden am gesunden Gewebe f¨uhrt als eine l¨anger dauerende mit niedriger Dosis. Umden optimalen Parameterbereich f¨ur diese Bestrahlungsart zu ermitteln, entsteht am DeutschenElektronen-Synchrotron (DESY) in Zeuthen ein Forschungsbereich zur Dosimetrievon Elektronenstrahlung in biologischem Gewebe. [...]

In einer Photogun wird mit einem Laserpuls ein Elektronenpaket aus einer Photokathode herausgelöst, und sofort in einer Kavität auf hohe Energie beschleunigt. Zur Strahlführung dient ein Solenoidmagnet. [...]