Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Minimizing betatron coupling of energy spread and divergence in laser-wakefield accelerated electrons

Sep 17, 2019, 4:00 PM
SML (Hotel Hermitage)


Hotel Hermitage

talk WG1 - Electron beams from plasmas WG1 - Plasma acceleration physics I


Alexander Koehler (Helmholtz-Zentrum Dresden - Rossendorf)


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.

Primary authors

Alexander Koehler (Helmholtz-Zentrum Dresden - Rossendorf) Richard Pausch (Helmholtz-Zentrum Dresden - Rossendorf) Dr Jurjen Couperus Cabadağ (Helmholtz-Zentrum Dresden - Rossendorf) Omid Zarini (Helmholtz-Zentrum Dresden - Rossendorf e.V.) Jakob Krämer (Danfysik A/S) Yen-Yu Chang (Helmholtz-Zentrum Dresden - Rossendorf) Susanne Schoebel (Helmholtz-Zentrum Dresden-Rossendorf) Thomas Kurz (HZDR) Michael Bussmann (Forschungszentrum Dresden-Rossendorf e.V.) Alexander Debus (Helmholtz-Zentrum Dresden-Rossendorf) Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf) Arie Irman (Helmholtz Zentrum Dresden Rossendorf)

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