Lorenz Ballauf successfully defended his thesis, entitled "5 to 500 eV reactive ion-surface interactions". Lorenz worked in the group of Prof. Paul Scheier, where he studied and worked on ion-surface interactions on a single particle level. During his PhD studies, he visited the J.H. Institute for Physical Chemistry, CZ, the Forschungszentrum Jülich, DE and the University of Hawaii,US for research. These collaborations lead to various publications. He received his PhD in Innsbruck on July 31^st 2020.