An apparatus for generating high pulse voltage, the apparatus comprising: - a high DC voltage source; - an inductive load made as a winding on a core and including a primary winding of a transformer, a secondary winding thereof being connected to a rectifier; - a low DC voltage source; - a control circuit; - a first controlled gate; - a diode; - a first controlled switch; - a first capacitor; - a second controlled gate; - a second capacitor; - a first terminal of the inductive load being connected to a positive terminal of the high DC voltage source; - a negative terminal of the low DC voltage source being connected to a negative terminal of the high DC voltage source; - power inputs (15, 17) of the control circuit being connected to respective terminals (13, 16) of the low DC voltage source; - a first (main) terminal of the first controlled gate being connected to a second terminal of the inductive load, a second terminal of the first controlled gate being connected to the negative terminal of the high DC voltage source, and a control input of the first controlled gate being connected to a first output of the control circuit; - a first input of the first controlled switch being connected to a cathode of the diode, a second input of the first controllable switch being connected to the second terminal of the inductive load, a control input of the first controlled switch being connected to a second output of the control circuit; - a first plate of the first capacitor being connected to the first input of the first controlled switch, a second plate of the first capacitor being connected to the second input of the first controlled switch; - a control input of the second controlled gate being connected to an output of the first controlled switch, a second terminal of the second controlled gate being connected to the second terminal of the inductive load; - a first plate of the second capacitor being connected to the first terminal of the second controlled gate, a second plate of the second capacitor being connected to the positive terminal of the high DC voltage source; characterized in that the apparatus further comprises - a second controlled switch; and - a square pulse duration converter; - an input of the square pulse duration converter being connected to the first output of the control circuit, an output of the square pulse duration converter being connected to a control input of the second controlled switch; - a first input of the second controlled switch being connected to the positive terminal of the low DC voltage source, a second input of the second controlled switch being connected to the negative terminal of the low DC voltage source, an output of the second controlled switch being connected to an anode of the diode. - a high DC voltage source; - an inductive load made as a winding on a core and including a primary winding of a transformer, a secondary winding thereof being connected to a rectifier; - a low DC voltage source; - a control circuit; - a first controlled gate; - a diode; - a first controlled switch; - a first capacitor; - a second controlled gate; - a second capacitor; - a first terminal of the inductive load being connected to a positive terminal of the high DC voltage source; - a negative terminal of the low DC voltage source being connected to a negative terminal of the high DC voltage source; - power inputs (15, 17) of the control circuit being connected to respective terminals (13, 16) of the low DC voltage source; - a first (main) terminal of the first controlled gate being connected to a second terminal of the inductive load, a second terminal of the first controlled gate being connected to the negative terminal of the high DC voltage source, and a control input of the first controlled gate being connected to a first output of the control circuit; - a first input of the first controlled switch being connected to a cathode of the diode, a second input of the first controllable switch being connected to the second terminal of the inductive load, a control input of the first controlled switch being connected to a second output of the control circuit; - a first plate of the first capacitor being connected to the first input of the first controlled switch, a second plate of the first capacitor being connected to the second input of the first controlled switch; - a control input of the second controlled gate being connected to an output of the first controlled switch, a second terminal of the second controlled gate being connected to the second terminal of the inductive load; - a first plate of the second capacitor being connected to the first terminal of the second controlled gate, a second plate of the second capacitor being connected to the positive terminal of the high DC voltage source; - a second controlled switch; and - a square pulse duration converter; - an input of the square pulse duration converter being connected to the first output of the control circuit, an output of the square pulse duration converter being connected to a control input of the second controlled switch; - a first input of the second controlled switch being connected to the positive terminal of the low DC voltage source, a second input of the second controlled switch being connected to the negative terminal of the low DC voltage source, an output of the second controlled switch being connected to an anode of the diode.