The invention relates to a trigger / ignition device in a Marx generator provided with n step capacitors, wherein n is a natural number higher than 1 of switches / spark-gaps and 2(n-1) charging branches, said switches / spark-gaps operating in a self-charging mode. The inventive trigger / ignition device is provided with at least one pulse transmitter connected to a pulse generator. An overvoltage is generated in a chronological matter and for short term on an adjacent spark gap in at least one charging branch of the Marx generator, said overvoltage being sufficient for one self-charging. The charging branch short-circuits the spark gap by means of an associated step capacitor arranged on the output side. The output winding of the pulse transmitter operates during charging in a charging coil / inductance mode and is connected to the pulse generator. Voltage pulse generated by the pulse transmitter during igniting / triggering of the pulse generator is added to a charging voltage of the associated step capacitor, thereby producing a short-term overvoltage required for the spark gap self-discharging.
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