NOVELTY - The Czochralski growth system comprises a growth chamber comprising a crucible, sidewalls, a top wall, a pedestal for supporting the crucible and a pull mechanism for retractably supporting a seed for contacting a melt contained in the crucible, an isolation valve disposed in one side wall of the growth chamber, a feed chamber that is vacuum sealed to the growth chamber through the isolation valve and contains feedstock, and a feeder (62) that is insertable into the growth chamber through the isolation valve to supply the feedstock into the growth chamber.    USE - The Czochralski growth system is useful for producing silicon ingots, which are useful in photovoltaic solar cells.    ADVANTAGE - The Czochralski growth system is capable of continuously producing the silicon ingots with high quality and purity.    DETAILED DESCRIPTION - The Czochralski growth system comprises a growth chamber comprising a crucible, sidewalls, a top wall, a pedestal for supporting the crucible and a pull mechanism for retractably supporting a seed for contacting a melt contained in the crucible, an isolation valve disposed in one side wall of the growth chamber, a feed chamber that is vacuum sealed to the growth chamber through the isolation valve and contains feedstock, a feeder (62) that is insertable into the growth chamber through the isolation valve to supply the feedstock into the growth chamber, is removable from the growth chamber into the feed chamber and is disposable in the growth chamber with the isolation valve that is closed, a drop box fixed inside the growth chamber having a sloping bottom for receiving the feedstock from the feeder, a spout positioned over the crucible, and a container for the feedstock disposed within the feed chamber. The sloping bottom is inclined at an angle of 30-60 degrees . The crucible comprises an inner zone positioned under the pull mechanism, and an annular outer zone that is present in fluid communication with the inner zone and is disposed under the spout of the drop box. The feeder comprises a feeder pan having a receiving section for receiving the feedstock from the container and an injector section that is connected to a cross section, has a cross section smaller than the receiving section and is insertable through the isolation valve into the growth chamber. The injector section has a concave bottom. The concave bottom has a V shape with walls oppositely inclined from vertical at 30-60 degrees . The container comprises a hopper having a funnel with a bottom spout positioned within sidewalls of the receiving section. The Czochralski growth system further comprises a vibrator supporting the receiving section, a bellows connecting the isolation valve and the feed chamber so that the feed chamber is displaceable away from the growth chamber, a shield system interposed between the feeder and the isolation valve when the feeder is inserted into the growth chamber and is withdrawable into the feed chamber when the feeder is retracted and the isolation valve is closed, and load cells supporting the pull mechanism and the feeder and control units responsive to the load cells for activating the feeder to supply the feedstock into the chamber. The vibrator is supported on the hopper. The hopper is supported in the feed chamber by the load cell. The bellows is connected to the isolation valve by a manually operating quick release coupling. The shield system comprises a back shield fixed to the feed chamber, and a front shield slidable into the back shield and projectable into the growth chamber. The front shield has an end insertable into a receiving section of the drop box. The isolation valve is a gate valve with an expandable watercooled gate.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a Czochralski growth system.    Crucible chamber (12)    Crucible (16)    Shaft (18)    Pull chamber (40)    Feeder. (62)