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

Generation of a spectrally two-component electron beam in a laser-wakefield accelerator

Sep 19, 2019, 6:20 PM
SML (Hotel Hermitage)


Hotel Hermitage

talk WG1 - Electron beams from plasmas WG1 - Hybrid staging and future PWFA experiments


Jonas Björklund Svensson (Lund University, Department of Physics)


A new take on ionization-assisted shock-front injection was used to create spectrally two-component beams in a laser-wakefield accelerator, with the goal of investigating the possibilities for such an injection scheme for beam-driven plasma-wakefield acceleration. Ionization injection was combined with shock-front injection to provide characteristic spectra with a broadband, continuous part from the ionization injection and a quasi-monoenergetic, spectrally separated peak at higher energies from the shock-front injection. This beam was subsequently sent into a second gas jet, which was pre-ionized by the laser pulse. As a result, electron beam divergence increase and deceleration was observed in the ionization-component and transverse focusing was observed for the shock-component. Under certain circumstances, an energy increase was also observed for the shock-component. These interactions were also typically accompanied by very collimated betatron X-ray beams with divergences of only a few mrad RMS, which suggests emission from an oscillation with a corresponding undulator K-parameter on the order of 1.

Primary authors

Jonas Björklund Svensson (Lund University, Department of Physics) Mr Kristoffer Svendsen (Lund university) Dr Anders Persson (Lund University, Department of Physics) Dr Olle Lundh (Lund University) Dr Diego Guenot (Lund University, Department of Physics) Dr Isabel Gallardo Gonzalez (Lund University) Dr Henrik Ekerfelt (Lund University)

Presentation materials