Polarized beams for electron accelerators
Institut für Kernphysik der Johannes Gutenberg-Universität zu Mainz, Germany
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Revised: 21 July 2011
Published online: 23 September 2011
NEA-GaAs based photocathodes allow the production of spin-polarized electron beams for fundamental research. We demonstrate how semiconductor properties influence salient parameters such as polarization and beam brightness. We present techniques that provide remedies for the extreme sensitivity to environmental factors. These are discussed for the specific installation that has provided spin-polarized beam at the MAMI facility during the last decade.
© EDP Sciences, Springer-Verlag, 2011