  Progress in neutron decay experiments requires better methods for the
characterization of electron detectors. I show that for such \b{eta}-decay
studies, electron time-of-flight can be used for in-situ calibration of
electron detectors. Energy resolution down to a few keV can be reached for the
lower part of the electron spectrum in neutron decay, where conventional
calibration methods come to their limit. Novel time-of-flight methods can also
be used to perform a complete experiment on electron backscattering from their
detectors.
