  We propose a new experiment at the Large Hadron Collider (LHC) that offers a
powerful and model-independent probe for milli-charged particles. This
experiment could be sensitive to charges in the range $10^{-3}e - 10^{-1}e$ for
masses in the range $0.1 - 100$ GeV, which is the least constrained part of the
parameter space for milli-charged particles. This is a new window of
opportunity for exploring physics beyond the Standard Model at the LHC.
