High Voltage Source from Voltage multiplier Cockcroft, Tesla Magnifying Transmitter, or Utkin Voltage Pump.
Prime the capacitor bank by switching on voltage source, then disconnect.
Then switch (using a Thyristor switch) charge current into inductor & load for 5 time constants at peak current switch off disconnect
with full impulse power transmission into rail & resistive particle or tuned impulse aether waveguide.
Typical output voltage kV to MV.
A series diode stack to increase & strengthen the reverse breakdown voltage.