A plasma reactor includes a toroidal plasma source having an RF power
applicator, and RF generator being coupled to the RF power applicator.
The reactor further includes a capacitively coupled plasma source power
applicator or electrode at the ceiling or the workpiece support, a VHF
power generator being coupled to the capacitively coupled source power
applicator, a plasma bias power applicator or electrode in the workpiece
support and an RF bias power generator coupled to the plasma bias power
applicator. A controller adjusts the relative amounts of power
simultaneously coupled to plasma in the chamber and conduit by the
toroidal plasma source and by the capacitively coupled plasma source
power applicator.