Mainz 2022 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 1: New Accelerator Concepts 1
AKBP 1.4: Talk
Monday, March 28, 2022, 14:45–15:00, AKBP-H13
Investigation of beam quality enhancement with tailored down-ramp profiles in laser wakefield accelerators using particle-in-cell simulations — •Jonas Günzl1,2, Richard Pausch1, Sergei Bastrakov1, Michael Bussmann3,1, Yen-Yu Chang1, Jurjen Couperus1, Arie Irman1, Susanne Schöbel1,2, Klaus Steiniger1, René Widera1, Ulrich Schramm1,2, and Alexander Debus1 — 1HZDR — 2TU Dresden — 3CASUS
Electrons from laser wakefield accelerators (LWFA) can be ultrashort and quasi-monoenergetic. They have the potential to be an ideal source for advanced light sources or beam drivers for hybrid laser-plasma wakefield accelerators (LPWFA). A wide variety of injection methods have already been developed to produce high-quality LWFA electrons. However, such high-quality electron bunches may degrade upon exiting the LWFA stage.
This poster addresses quality-preserving methods for extracting electron beams from laser wakefield accelerators by adjusting the plasma density of the down ramp. By modeling different gas profiles with the fully relativistic particle-in-cell code PIConGPU, not only the final beam quality but also all relevant physical effects can be studied in detail. This allows not only to find an optimal quality-preserving down ramp but also to study the influence of changes in laser focus position on beam properties during extraction.