Abstract
A high voltage power supply system for a compact neutron generator is developed. A four-stage symmetrical Cockcroft-Walton voltage multiplier circuit is adopted to produce 300 kV direct current high voltage. A two-stage 360 kV isolation transformer system is used to drive the ion source power supply. The high voltage power supply and the isolation transformer system are integrated in an epoxy bucket with a size of ϕ360 × 700 containing No. 25 transformer oil. The maximum output voltage of the power supply can reach 300 kV. The variation in the high voltage power supply is less than 0.5% when the power supply works at 300 kV/6 mA with an input voltage variation of ±8%. Meanwhile, the isolation transformer system can withstand more than 360 kV, with its output power being about 2.5 kW. No overvoltage protection devices are used in the power supply, and the protection resistors are connected in series to two pairs of rectifiers at the highest and lowest potential terminals and to the output terminal of the voltage multiplier to prevent overcurrent.
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