4th European Advanced Accelerator Concepts Workshop

Session

WG1-WG5 Joint Session - Advanced Beam Metrology

16 Sept 2019, 16:00

SML (HH)

72. Observation of sub-femtosecond structures in laser wakefield accelerated electron bunches

Omid Zarini (Helmholtz-Zentrum Dresden - Rossendorf e.V.)

16/09/2019, 16:00

WG1-WG5 Joint Session

talk

Laser wakefield accelerators (LWFA) feature unique electron bunch characteristics, namely micrometer beam size with duration ranging from a few fs to tens of fs. Precise knowledge of the longitudinal profile of such ultra-short electron bunches is essential for the design of future table-top x-ray light-sources.
Spectral measurements of broadband transition radiation from LWFA electron bunches...

76. Gamma-ray radiation in beam-plasma interaction as a diagnostics for emittance growth in PWFA and for beam filamentation instabilities

Sébastien Corde (Ecole Polytechnique)

16/09/2019, 16:20

WG1-WG5 Joint Session

talk

Low-emittance ultra-relativistic electron beams delivered for next gener- ation of plasma wakefield acceleration (PWFA) experiments are expected to produce very high wakefields over very large distances when going through a plasma. Assessing electron beam dynamics under such fields will be of key importance to achieve the next milestones of the PWFA concept. Here we report on the use of the...

128. Energy resolved emittance measurements and chromatic emittance growth of laser-wakefield accelerated beams

Paul Winkler (Center for Free-Electron Laser Science & Department of Physics, University of Hamburg, Hamburg, Germany and DESY)

16/09/2019, 16:40

WG1-WG5 Joint Session

talk

A crucial parameter for the demonstration of a laser-plasma driven free-electron laser is the electron beam emittance and its stability. Here, we show energy resolved emittance measurements of ionisation-injected plasma electron beams performed with both a conventional quadrupole scan and measured from single-shots. We show that the initial phase-space properties obtained from both methods...

271. Multi Spectral CTR Imaging and Interferometry of Laser Wakefield Accelerated Electron Bunches

Maxwell LaBerge (University of Texas - Austin)

16/09/2019, 17:00

WG1-WG5 Joint Session

talk

The low emittance of electron bunches from laser wakefield accelerators (LWFAs) makes them attractive for compact FELs and colliders. Single-shot, direct, non-intercepting diagnostics of this emittance outside the LWFA are, however, needed. Here we present single-shot coherent transition radiation (CTR) imaging and interferometry data from electron bunches ~2 mm after emerging from a 300 MeV...