The Portable 10 <sup> 10 </ Sup> N / S Neutron Generator Circuit Development

The circuit system for the portable sealed tube neutron generator with neutron yield more than 1010n/s is described in this thesis. The ion source circuit, the reservoir circuit and the target high voltage circuit of this neutron generator are studied in detail. A compositive DC-DC high voltage module is used to produce the high voltage for the ion source of the neutron tube, thus we simplize the structure of this circuit. We developed a new air pressure auto-control circuit. The PID control technology is used in the circuit for controlling the current of the reservoir and air pressure of the ion source better. We developed a new power for heating the reservoir through using Vicor power module which is first-class in the world. These means improve the stability of the ion source.A portable target high voltage circuit that has 200kV,　5mA output is developed. In the circuit, we adopt the structure of direct current, steady voltage – inverter – multiplier circuit. We adopt both switch adjustment and linear adjustment method in direct current steady voltage circuit, and achieve the continuous adjustment from 0VDC to 250VDC. The working frequency is chosen at high wave band, which diminishes the volume of the neutron generator to a great extent. For purpose of reducing the reactive power produced by the cockcroft-walton voltage multiplier, the means of Increasing the leakage inductance of the high voltage transformer is put forward in the thesis, and analyzed simply in theory. Then a new method and means is provided for developing higher power higher voltage electrical source, and improving their reliability.