At the same time the plural switches/n of the same number as the spark gap (n is natural number here and it is larger than 1) the condenser of the step and 2 (n-1) we are constituted from the charge amount crossroad, the trigger/igniting arrangement in the Marx generator where the spark gap operates to self surrender system is proposed. The trigger/igniting arrangement is formed at least from one which is connected to the pulse generator pulse transformer. In at least one among the charge amount crossroads of the Marx generator, the overvoltage which reaches to self surrender is formed to specified point in time in the brief spark gap. As for the charge amount crossroad the spark gap which excludes the spark gap in output side making use of the step condenser of post, the bridge is done. The output side coil of the pulse transformer operates while charging the charging current armature/as a charge inductance, the input side coil is connected to the pulse generator. The ignition of the pulse generator/to the case of the trigger, the overvoltage which is necessary for self surrender in addition to the charge voltage of the condenser of the step to which the voltage pulse which is formed making use of the pulse transformer corresponds, brief is formed in the spark gap.
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