I need to switch an inductive load on and off very quickly. Turning an inductive load on and off very quickly implies the supply voltage is large, several kV. Peak current through the load is several kA. It's common to use SCRs to do this, but the problem is that the supply is DC and you wind up buying a lot of transistors anyway to turn the SCR's off. (Parallel IGBT to turn off SCR needs to accept the same reverse voltage as SCR and just as much current, albeit for a shorter period of time.)
Here is my question:
Can a vacuum tube switch DC on and off very quickly?
I want the tube to turn on in < 1 us, stay on for 3 ms, and then turn off in < 1 us. After that the circuit is off for > 30 ms.
Is this a thing that a tube can do?
If yes, how do you model this mathematically? For example, is a tube a voltage-to-current converter like a MOSFET? Current gain like a BJT? Something else?
As for tube type, I'm thinking triode only because it's one of the simpler kinds. Obviously I'm new to tubes and I'm open to other tube types as well.