A HIGH VOLTAGE PULSE GENERATOR A METHOD OF OPERATING A HIGH VOLTAGE PULSE GENERATOR

The invention relates to a Marx generator (1) comprising a circuit which includes at least two capacitors (C) which are arranged to be charged in parallel and to be discharged in series. The circuit comprises at least two spark gap switches (5), wherein each spark gap switch comprises two electrodes (7a, 7b) separated by a gap distance (G) which is filled with a pressurized gas (13), and wherein each spark gap switch (5) is configured to allow an electric spark to pass between its two electrodes in case a potential difference between said two electrodes exceeds a breakdown voltage, and wherein the Marx generator (1) includes an adjustment unit (10) which is configured to adjust the gap distance (G) between the two electrodes of each of the at least two spark gap switches such as to control the output voltage, wherein the adjustment unit (10) is configured to adjust the gap distance by means of a pressure controlled actuator and/or volume controlled actuator (12).