The basic guideline
A charged capacitor is made to discharge itself through this series RLC circuit consisting of the electromagnetic coil. The intention is to make the current delivered by the capacitor to be of very high frequency and amplitude. The discharge is initiated by a small gate pulse applied at the gate of an SCR placed in series with the capacitor. A protection diode, acting as a free wheel, can also be provided to allow the current to circulate in the coil, protecting the electrolytic capacitor from damage.