Berlin 2014 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 10: Posters 2: Biomolecules, Energy Transfer, Clusters, Quantum Chemistry, Molecular Dynamics and Chirality
MO 10.26: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
PEGASUS: Building an intense spin-polarized electron gun - status report — •Michael Lestinsky1, Daniel Schury1, Siegbert Hagmann1, Christophor Kozhuharov1, and Thomas Stöhlker1,2 — 1GSI Helmholtzzentrum für Schwerionenforschung, D-64291Darmstadt — 2Helmholtzinstitut Jena, Friedrich-Schiller-Universität Jena, D-07743 Jena.
The PEGASUS project aims at building an intense and portable spin-polarized electron gun for experiments in crossed beams arrangements at various ion beam facilities. The electron beam will cover energies between 1 and 10 keV at electron currents up to 100 µA. As source material we will utilize laser-induced electron emission from GaAs photocathodes which will be prepared in a state of negative electron affinity. With a set of electrostatic lenses and benders, the electrons will be transported to the interaction zone and Wien-filters will be used for controlling the spin orientation.
We give a status report on our progress for building the setup and discuss foreseen experiments.