Accurate computer simulation of a drift chamber

We describe a general purpose program for drift chamber studies. First the capacitance matrix is calculated using a Green's function technique. The matrix is used in a linear-least-squares fit to choose optimal operating voltages. Next the electric field is computed, and given knowledge of gas parameters and magnetic field environment, a family of election trajectories is determined. These are finally used to make drift distance vs time curves which may be used directly by a track reconstruction program. We compare results with data obtained from the cylindrical chamber in the Axial Field Magnet experiment at the CERN ISR. (orig.)