Need a technique to rectify high voltage high frequency
Or use 40 per string for margin.  1N4007  8pF each
But verify L and SRF freq.


Insert diode PCB in oil.

BEWARE that forward capacitance increases with current and Ri decreases and  trr recovery time increases.  So if your average current is 250mA yet peak current 10x this you will have a trr problem so use faster diodes such as RS1MWF ( Diodes inc.) SMD.



or Buy from here

Then you need these.