Trigger transformer

Strobe lights, for instance operate the core in a unipolar, unsaturated mode.

300 volts, at which point a second capacitor pulses voltage through the transformer, achieving the approx.

2000-6000 volts (depending upon the characteristics of the specific flash tube) necessary to overcome the resistance of the inert gas (such as xenon) between the electrodes, ionizing it.

Trigger transformers operate by means of a secondary coil with hundreds, even thousands, of turns of very fine copper wire, trading current for voltage.

The capacitors begin charging again, starting the cycle anew and giving rise to their characteristic periodic flashing.