Abstract: A medical container sterilization apparatus includes: an electron beam generator; a probe placed in proximity to an electron plume projected from the generator; and electronics configured to accept a signal carried by the probe, the signal, the signal indicative of a sterilization level of the electron plume, the electronics further configured to indicate if the sterilization level is not sufficient. A medical container sterilization method includes: (i) collecting electrons from a sterilizing electron plume; (ii) generating a signal from the collected electrons; and (iii) determining from the signal whether the electron plume is sufficient to properly sterilize the medical container.