plasma stimulation current vs voltage source?

[sarepairman2]

So they sell 13something MHz amplifiers for generating plasma.

If you have a plasma chamber and you connect a RF current source vs a voltage source to it, does the plasma behave differently?
How about a constant power source?

[T3sl4co1l]

How would you be able to do either, when the impedance varies so strongly?

Typical plasma systems use a self-tuning load match ($!!!), supplied by an amplifier that can handle very high SWR, at least for short periods.  The SWR is very high while the tuner slews to the new setpoint, which is very different between startup (no plasma = very high impedance at the coil/electrode) and operation (low impedance).

Tim