Mainz 2022 – scientific programme
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SYPA: Symposium Plasma Induced Accelerators
SYPA 1: Plasma Induced Accelerators
SYPA 1.3: Invited Talk
Thursday, March 31, 2022, 10:00–10:30, Audimax
Hybrid plasma accelerators towards higher-quality electron beams — •S. Karsch1,2, M. Foerster1, A. Döpp1,2, M. Gilljohann1,3, J. Götzfried1,2, K. v. Grafenstein1, F. Haberstroh1, J. Wenz1, S. Corde3, O. Kononenko3, B. Hidding3, T. Heinemann4,6, T. Kurz5, J. Couperus-Cabadag5, U. Schramm5, A. Debus5, and A. Martinez de la Ossa6 — 1Ludwig-Maximilians-Universität München — 2Max-Planck-Institut für Quantenoptik — 3Laboratoire d'Optique Appliquee — 4University of Strathclyde — 5Helmholtz-Zentrum Dresden-Rossendorf — 6Deutsches Elektronen-Synchrotron
Laser wakefield acceleration (LWFA) and plasma wakefield acceleration (PWFA), are commonly treated as separate branches of high-gradient plasma- based acceleration. In combination they open a new path for generating ultralow-emittance electron beams from readily available laser sources. While LWFA can generate ultrahigh-current, highly relativistic electron bunches, their emittance is compromised by the strong plasma heating in the oscillating laser fields. By using LWFA-generated electron bunches to drive a wakefield in a secondary plasma, and employing cold injection schemes to provide a suitable witness bunch, we generate ultralow-emittance beams in a small laser lab in a scheme we call Hybrid LPWFA. I will present our experimental findings for the cases of externally and intenally injected witness bunches. They demonstate that LPWFA can yield more stable and higher quality beams than pure LWFA , which makes this approach very interesting for light source applications and as ultracold injectors.