APPROACHES TO PLASMA DESORPTION MASS-SPECTROMETRY BY SOME THEORETICALPHYSICS CONCEPTS

This report is a collection of some aspects of the work pursued by the theoretical physics group at the University of Oldenburg studying the mechanism of the PDMS desorption process. Specifically we present fir st a quantitative macroscopic hydrodynamic model designed to describe the PDMS desorption process up to the actual disruption starting from a Lagrangian-density formalism. The microscopic mechanical details of the process are followed by a molecular dynamics program making use of a novel momentum reflection-free boundary condition. Finally we repor t briefly on the large-scale calculations necessary to calculate the i ntricate thermal quantum-mechanical properties of clusters, necessary to understand the post-desorption phenomena of desorbed clusters. In t he last section we give information on first experiences with computer package tools developed for analyzing PDMS spectra. We hope that thes e will be widely used by experimentalists for individually analyzing t asks of their own.