Dresden 2026 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 10: Plasma Accelerators, Diagnostics I
AKBP 10.2: Vortrag
Mittwoch, 11. März 2026, 15:30–15:45, SCH/A117
Novel approaches of using transition radiation to diagnose driver dynamics in plasma wakefield accelerators — •Nico Wrobel1,3, Finn-Ole Carstens1,3, Alexander Debus1, Arie Irman1, Maxwell La Berge1, Susanne Schöbel1, Ulrich Schramm1,3, Klaus Steiniger1,2, Jessica Tiebel1,3, Patrick Ufer1, and Richard Pausch1 — 1Helmholtz-Zentrum Dresden - Rossendorf e.V., DE — 2Center for Advanced Systems Understanding, Görlitz, DE — 3TU Dresden, DE
LPWFA is a new hybrid accelerator concept which combines laser wakefield accelerators (LWFA) and plasma wakefield accelerators (PWFA), resulting in an ultra-compact form factor while promising improved beam quality, compared to LWFA. The dynamics of the PWFA driver are investigated due to their impact on the capabilities to accelerate particles in the plasma wake. Since the driver beam dynamics cannot be directly observed in experiment, new diagnostic methods had to be explored, which we will present here.
Coherent transition radiation (CTR) was investigated to diagnose longitudinal and transversal driver dynamics with the help of the open-source particle-in-cell code PIConGPU. We were able to detect the breakup of the driving bunch through the emitted CTR spectrum and developed a novel diagnostic approach, which may be able to reconstruct time-dependent driver dynamics, like driver oscillation, from CTR measurements.
Keywords: Plasma Accelerator; PWFA; PIConGPU; particle-in-cell; transition radiation