Speaker
Michael Switka
(University of Bonn)
Description
The ELSA facility at the University of Bonn uses a storage ring to accelerate polarized electrons up to 3.2 GeV. The photoinjector source is driven by a Ti:Sa laser beam to obtain a high polarization degree (~80%) from a strained-layer GaAsP superlattice crystal photocathode. To improve beam transfer efficiency following a prolonged shutdown of the source, the in-house developed diagnostic software Fgrabbit has been employed for the analysis of laser and electron beam camera images. This provides increased precision in the optimization process and, in particular, enables spatially resolved quantum efficiency mapping of the photocathode surface.
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Authors
Axel Spreitzer
(University of Bonn)
Michael Switka
(University of Bonn)
Co-authors
Dennis Proft
(University of Bonn)
Klaus Desch
(University of Bonn)
