  We propose a model-independent quantity, $L/G$, to characterize non-Gaussian
tails in beam profiles observed with the Fermilab Booster Ion Profile Monitor.
This quantity can be considered a measure of beam halo in the Booster. We use
beam dynamics and detector simulations to demonstrate that $L/G$ is superior to
kurtosis as an experimental measurement of beam halo when realistic beam
shapes, detector effects and uncertainties are taken into account. We include
the rationale and method of calculation for $L/G$ in addition to results of the
experimental studies in the Booster where we show that $L/G$ is a useful halo
discriminator.
