Dresden 2020 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 7: Diagnostics, Control and Instrumentation
AKBP 7.4: Talk
Tuesday, March 17, 2020, 15:15–15:30, MOL 213
Energy Resolved Emittance Measurements of Laser-Wakefield Accelerated Beams — •Paul Winkler1, Lars Hübner1, Björn Hubert2, Sören Jalas2, Manuel Kirchen2, Philipp Messner2,3, Laurids Jeppe2, Vincent Leroux2, Timo Eichner2, Thomas Hülsenbusch2, Matthias Schnepp2, Maximilian Trunk2, Christian Werle1, Bernhard Schmidt1, and Andreas R. Maier2 — 1DESY — 2Center for Free-Electron Laser Science and Department of Physics, Universität Hamburg — 3Max Planck Institute for the Structure and Dynamics of Matter
Laser-wakefield accelerators enable the generation of electron beams with initially nm-small emittances and GeV-level beam energies within cm-scale. However, shot-to-shot fluctuations in beam quality can pose a limit to the transportability of plasma-generated beams, and, in particular, impede the measurement of the beam emittance using conventional methods.
Here, we present results from an emittance diagnostic implemented at the LUX laser-plasma accelerator. Results from a single-shot method are compared to results obtained from a quadrupole-scan for different energy-slices. After proving the applicability of the single-shot method at our setup for a narrow energy interval, we show an energy-resolved measurement of the electron phase-space. Slice-emittances as low as 0.8 mm mrad from ionization-injected beams as well as a complex modulation of the electron phase-space along the broad energy spectrum are observed.