Dresden 2026 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 12: Novel Accelerators I
AKBP 12.4: Vortrag
Donnerstag, 12. März 2026, 10:30–10:45, SCH/A117
Microsecond-timescale plasma density growth by electron beam energy deposition in plasma-wakefield accelerators — •Judita Beinortaite1, Jonas Björklund Svensson1, Lewis Boulton1, Greg Boyle2, Brian Foster1,3, Pau González Caminal1, Harry Jones1, Advait Kanekar1,4, Anna Křivková1, Gregor Loisch1, Jens Osterhoff1, Felipe Peña1,4, Sarah Schröder1, Stephan Wesch1, Matthew Wing1,5, Jonathan Wood1, and Richard D'Arcy1,3 — 1DESY, Germany — 2James Cook University, Australia — 3J.A.I, UK — 4University of Hamburg, Germany — 5University College London, UK
High-repetition-rate operation of plasma-wakefield accelerators is essential for their suitability in the design of particle colliders and Free-Electron Lasers (FELs). Energy remaining in the plasma after the wakefield acceleration event can limit the repetition rate of the plasma accelerator as the plasma takes time to relax to its initial state. This relaxation is dominated by two ion-driven effects: their redistribution after the wakefield event and potential further collisional ionisation caused by this motion. In this work, we investigated argon plasma at a variety of working points with two different diagnostics: the pump-probe electron-beam-based technique and optical-emission spectrometry. In some regimes, both diagnostics indicated additional ionisation occurring on the nanoseconds-to-microsecond timescale for specific initial plasma conditions, which increased the recovery time. This can inform the design of the highest-repetition-rate plasma sources for future colliders and FELs.
Keywords: plasma; wakefield; repetition rate