  Laser-based ion acceleration is driven by electrical fields emerging when
target electrons absorb laser energy and consecutively leave the target
material. A direct correlation between these electrons and the accelerated ions
is thus to be expected and predicted by theoretical models. We report on a
modified wide-angle spectrometer allowing the simultaneous characterization of
angularly resolved energy distributions of both ions and electrons. Equipped
with online pixel detectors, the RadEye1 detectors, the investigation of this
correlation gets attainable on a single shot basis. In addition to first
insights, we present a novel approach for reliably extracting the primary
electron energy distribution from the interfering secondary radiation
background. This proves vitally important for quantitative extraction of
average electron energies (temperatures) and emitted total charge.
