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## Main Question or Discussion Point

I will make some assertions and then phrase a question , please correct me if necessary.

So the tokamak works like a transformer where the primary is a coil winding while the secondary is a torus which contains plasma which being electrically conductive forms the secondary winding?

The toroidal field coils are there surrounding this "secondary plasma winding" for added plasma stability and to keep it away from vessel walls trying to maintain the charged particle trajectories along the closed B field lines looping around the torus?

Now since I don't see any electrodes physically going inside the plasma torus I assume the plasma ohmic heating is done simply by inducing a current in the "short circuit" one loop secondary which is the plasma.

What frequency is used for this main transformer action ?

I was trying to find but at first hand had no luck , what would be/are the currents in ITER for example in the transformer primary when at full load , maybe someone knows the primary turns and applied voltage/frequency of this transformer?

Anyway the applied current is probably large in order to induce and even larger current in the secondary which is the plasma itself, I was then wondering could reactive power be used here to save some of the energy necessary for plasma heating? Because plasma much like a wire gets heated when more and more current is passing through it and as we know in transmission lines such current can arise from reactive power being transferred back and forth between source and load, I wonder is it possible to create the same scenario in a tokamak transformer where by shifting the current and voltage out of phase in the secondary one could maintain high current but lower the total energy consumed in the secondary which seems like a short circuit otherwise. The plasma to the best of my knowledge behaves like a low resistance resistor and the heat dissipated in a resistor is proportional to current so would shifting the voltage and current out of phase help in reducing total energy consumed or would it simply decrease the current through the plasma and defeat any such attempt at conserving some of the applied power, because of ohms law where lover voltage through a resistor causes lower current?

just a curiosity

So the tokamak works like a transformer where the primary is a coil winding while the secondary is a torus which contains plasma which being electrically conductive forms the secondary winding?

The toroidal field coils are there surrounding this "secondary plasma winding" for added plasma stability and to keep it away from vessel walls trying to maintain the charged particle trajectories along the closed B field lines looping around the torus?

Now since I don't see any electrodes physically going inside the plasma torus I assume the plasma ohmic heating is done simply by inducing a current in the "short circuit" one loop secondary which is the plasma.

What frequency is used for this main transformer action ?

I was trying to find but at first hand had no luck , what would be/are the currents in ITER for example in the transformer primary when at full load , maybe someone knows the primary turns and applied voltage/frequency of this transformer?

Anyway the applied current is probably large in order to induce and even larger current in the secondary which is the plasma itself, I was then wondering could reactive power be used here to save some of the energy necessary for plasma heating? Because plasma much like a wire gets heated when more and more current is passing through it and as we know in transmission lines such current can arise from reactive power being transferred back and forth between source and load, I wonder is it possible to create the same scenario in a tokamak transformer where by shifting the current and voltage out of phase in the secondary one could maintain high current but lower the total energy consumed in the secondary which seems like a short circuit otherwise. The plasma to the best of my knowledge behaves like a low resistance resistor and the heat dissipated in a resistor is proportional to current so would shifting the voltage and current out of phase help in reducing total energy consumed or would it simply decrease the current through the plasma and defeat any such attempt at conserving some of the applied power, because of ohms law where lover voltage through a resistor causes lower current?

just a curiosity

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