Dresden 2020 – scientific programme
The DPG Spring Meeting in Dresden had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
AKBP: Arbeitskreis Beschleunigerphysik
AKBP 8: New Accelerator Concepts
AKBP 8.3: Talk
Tuesday, March 17, 2020, 15:00–15:15, HSZ 301
Minimizing betatron coupling of energy spread and divergence in laser-wakefield accelerated electrons — •Alexander Köhler1, Richard Pausch1, Jurjen Pieter Couperus Cabadag1, Omid Zarini1, Yen-Yu Chang1, Thomas Kurz1,2, Susanne Schöbel1,2, Michael Bussmann1, Alexander Debus1, Ulrich Schramm1,2, and Arie Irman1 — 1Helmholtz-Zentrum Dresden - Rossendorf — 2Technische Universität Dresden
Matched beam loading in laser wakefield acceleration (LWFA) flattens the accelerating electric field along the bunch and leads to the minimization of energy spread at high bunch charges. By using the self-truncated ionization injection scheme for controlling the injected charge, we demonstrate that minimal energy spread coincides with a reduction of the normalized beam divergence. Betatron radiation spectroscopy simultaneously confirms a constant beam radius at the plasma exit. Together, the decrease in divergence can be attributed to the reduction of chromatic betatron decoherence. Thus, beam loading enables the highest longitudinal and transverse phase space densities by optimizing energy spread and normalized divergence.