The design of an angular array electron time-of-flight (eToF) spectrometers is reported, intended for non-invasive spectral, temporal, and polarization characterization single shots high-repetition rate, quasi-continuous, short-wavelength free-electron lasers (FELs) such as the LCLS II at SLAC. This also enables angle-resolved, high-resolution eToF spectroscopy to address a variety scientific q...
