Methods, computer-readable mediums and systems for reducing transistor recovery are disclosed. The turntable has a support frame that can slide above and is suspended from the pylon, coupling devices connected to the support frame to permit the coupling of a crane boom, and support devices to allow the support frame to revolve around the longitudinal axis of the pylon. The layer extending over the holes of the exit window foil provide thinner window regions which allow easier passage of the electrons through the exit window. 5 or greater, viscosity being measured at 340\xb0 C. In one embodiment, at least a portion of the non-volatile fractions recovered from at least one of the separation zones is recycled back to at least a contacting zone.