Dresden 2026 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 1: Electron Accelerators and Sources I

AKBP 1.2: Topical Talk

Montag, 9. März 2026, 10:00–10:30, SCH/A117

Status of Source and Delivery of Spin-Polarized Electron Beams at ELSA — •Michael Switka, Klaus Desch, Dennis Proft, and Axel Spreitzer — University of Bonn, Physics Institute, Bonn, Germany

Operation of the 50 kV GaAs-based photoinjector source for spin-polarized electrons at the electron stretcher accelerator (ELSA) has been re-established and its usage for regular machine operation is being prepared. This includes the recommissioning of a Compton backscattering polarimeter located in the 3.2 GeV fast ramping storage ring to monitor the effects depolarizing resonances and their countermeasures during the energy increase. An overview of the latest achievements and upcoming improvements is presented.

Keywords: Polarized Electron Beams; Polarized Source; Polarimetry; Depolarizing Resonances