I want to build voltage multiplier using Cockcroft–Walton scheme.
I've got bunch of 3kV capacitors (2200pF though), and even bigger bunch of 1N5399 1kV diodes.
So, obviously I want 3 diodes in series to match capacitors rating.
I know that one cannot simply do that, and one need balancing resistors to match reverse current, but I see that for reverse current in datasheet (5uA) I need 200MOhm resistors, which seems to be something I can ommit. I know that at elevated temperatures diode reverse current would increase, but I won't work above 30 C.
Getting Higher-voltage diodes is probably not an option - they are ether too expensive or have too high forward drop voltage (like 20V for TV 14kV generators), and tiny current.
Suggestions, can I go without resistors?
PS. I know that I might want bigger caps, but they are not really common stuff. In this case I will have DC stage providing 3000V single polarity pulses @~30kHz or a bit more, so output current should be sufficient even with 2200pF. Target voltage is 15-20kV, so I will have ~ 7 stages.