Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster: Collisions, scattering and recombination

A 26.3: Poster

Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer

PEGASUS: Building an intense spin-polarized electron gun - First test runsMichael Lestinsky1, •Daniel Schury1,2, Siegbert Hagmann1, Christophor Koshuharov1, and Thomas Stoehlker1,31GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt — 2Institut für Atom- und Molekühlphysik, Universität Giessen, D-35392 Giessen — 3Helmholtzinstitut 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.

Results from first test runs will be presented and foreseen experiments discussed.

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DPG-Physik > DPG-Verhandlungen > 2015 > Heidelberg