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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 14: Instrumentation II
AKBP 14.5: Talk
Thursday, March 23, 2023, 16:30–16:45, CHE/0183
First two-bunch measurements using the electro-optical near-field monitor at KARA — •Micha Reißig1, Erik Bründermann1, Bastian Härer1, Akira Mochihashi1, Gudrun Niehues1, Meghana M. Patil2, Robert Ruprecht1, and Anke-Susanne Müller1,2 — 1IBPT, KIT, Karlsruhe — 2LAS, KIT, Karlsruhe
The Karlsruhe research accelerator KARA is an electron storage ring, which features an electro-optical near-field monitor as a tool for longitudinal bunch profile measurements. The device performs well in single-shot turn-by-turn measurements during single-bunch operation and over the years, the design has been optimized to be prepared for measurements in multi-bunch operation. The ability to work with multiple bunches and short bunch spacing is an important step to make the device suitable for more application purposes, such as a diagnostics tool for the future electron-positron collider FCC-ee. This contribution provides first tests of the monitor during two-bunch operation with minimum 2 ns bunch spacing. Challenges like crystal heating due to an increased beam current are discussed and strategies for mitigation are presented.