Göttingen 2025 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 5: Particle Sources

AKBP 5.1: Talk

Wednesday, April 2, 2025, 11:00–11:15, ZHG004

Current Developments in a Hybrid Thermionic and Photoemission Electron Gun for ELSA — •Samuel Kronenberg, Klaus Desch, Philipp Hänisch, Dennis Proft, Yannick Schober, and Michael Switka — Physikalisches Institut der Universität Bonn

A novel electron gun is currently under development for the S-band Linac injector for ELSA. The goal of this enhancement is to realise a new single bunch injection mode in addition to the standard long pulse (multi bunch) mode along with a potential increase in emission current. A dual-mode design is being developed that utilises a caesium dispenser cathode both as a thermionic and a photo-cathode using thermally assisted photoemission. Initial measurements on dispenser cathodes were performed to verify the properties in this mode of operation. The current progress regarding gun design, as well as the development of a dedicated gun test stand will be presented.

Keywords: electron gun; TAPE; photocathode; test stand; hybrid mode