High voltage power supply

A high voltage power supply, comprising:

• a power converter switching on/off and converting an input direct current power into a direct current power having a preset voltage level;
• and
• a voltage multiplier comprising a first multiplying cell multiplying the voltage level of the direct current power from the power converter,
• wherein the first multiplying cell comprises:
• first and second capacitors charging the direct current power from the power converter, respectively;
• a first diode providing a path for transferring the direct current power when the power converter is switched off;
• and
• a second diode providing a path for transferring the direct current power when the power converter is switched on,
• wherein the first diode of the first multiplying cell comprises a cathode electrically connected to the power converter and an anode electrically connected to the second diode,
• the second diode comprises a cathode electrically connected to the first diode and an anode electrically connected to the second capacitor,
• the first capacitor has one end electrically connected to a junction between the first and second diodes and another end electrically connected to an input direct current power terminal, and
• the second capacitor has one end electrically connected to the cathode of the first diode and another end electrically connected to the anode of the second diode.