Massless gap corrections to the SDC EM energy resolution

Often the calorimeter system is not the first material that particles emerging from an interaction encounter. Therefore, the problem of inert material upstream of a calorimeter is endemic. The purpose of this note is to use existing ''Hanging File = HF'' data to quantify the effect of this material and to examine ways to alleviate those effects. Previous studies have been made using CDF test beam data and using the EGS Monte Carlo program to study the electromagnetic response