  We derived the geometrical parameters on the tube connections that homogenize
the pressure drop in a multi-chamber vacuum system, where each chamber has a
distinct volume and all are connected to the same vacuum pump. We start
deriving the pressure drop in a single chamber for a tube with finite
conductance. Next, we derive a solution that provides the radius and length for
each tube connection between the chambers and the pump that homogenize the
pressure drop in all chambers.
