Göttingen 2025 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 6: Accelerators for Medical Applications (joint session ST/AKBP)

AKBP 6.4: Vortrag

Mittwoch, 2. April 2025, 14:45–15:00, ZHG009

Development of a Fast Extraction Method to Extract High Intensity Short Pluses at ELSA — •Leonardo Thome, Klaus Desch, Dennis Proft, and Michael Switka — Physikalisches Institut der Universität Bonn

The electron accelerator facility ELSA delivers electron beams up to 3.2 GeV energy, extracted via slow resonance extraction from the stretcher ring in an extraction cycle of typically 10 s. Currently ongoing studies for radiation therapy, investigating the FLASH effect, require short beam pulses reaching from ns to ms. In a preliminary operation mode the booster synchrotron is already used to deliver electrons beam pulses of 1.2 GeV energy with fixed length of 250 ns to irradiate cell samples. To cover higher energies up to 3.2 GeV and different pulse lengths ranging from ns up to several ms, a fast extraction method from the stretcher ring is developed. The concept and realization by different techniques such as a repurposing of the existing injection kickers for extraction or utilizing a dispersive orbit to extract the beam is evaluated.

Keywords: Extraction method; Kicker; FLASH radiation therapy