A kind of pulse power supply system and neutron generator

Abstract

The invention relates to a pulse power supply system and a neutron generator, which can provide several pulses with different pulse widths and amplitudes for the neutron generator through four pulse voltages of positive acceleration high voltage, negative acceleration high voltage, anode voltage and trigger voltage The voltage meets the working requirements of the vacuum arc ion source neutron generator, wherein the accelerating high voltage is generated through the first secondary coil of the first pulse transformer T1, the trigger voltage is generated through the second pulse transformer T2, and the anode voltage is generated through the first pulse transformer The second secondary coil of T1 and the main discharge capacitor C4 are generated, and the negative acceleration high voltage is generated through the third pulse transformer T3; the second secondary coil of the first pulse transformer T1 and the second pulse transformer T2 are both used as a step-up transformer for the pulse power supply It is used as an isolation transformer to solve the problem of floating voltage, and the positive and negative accelerating pole structures are used to effectively reduce the insulation distance. The three pulse forming circuits share one charging power supply, which makes the power system structure very compact.

Description

technical field [0001] The invention relates to the technical field of neutron generators, in particular to a pulse power supply system and a neutron generator. Background technique [0002] As a neutron source for small accelerators, neutron generators have many advantages such as portability, mobility, safety in use, and no radiation hazards, and have been widely used in oil and gas well logging. In order to meet the needs of logging in deeper formations, neutron generators are required to have smaller diameters and higher temperature resistance. The ion source of the neutron generator generally includes a Penning ion source and a vacuum arc ion source. The vacuum arc ion source is composed of a cathode, an anode, and a trigger electrode. [0003] When the vacuum arc ion source neutron generator is working, a pulse high voltage with an amplitude of about 10kV and a pulse width of several μs is firstly applied between the trigger electrode and the cathode to generate initi...

AI Technical Summary

Problems solved by technology

Trigger pulse high voltage, main arc discharge pulse high voltage and acceleration pulse high voltage are all different in amplitude, pulse width and timing. The existing technology uses several pulse power supplies to supply power independently, which makes it very difficult to miniaturize the power supply and cannot meet the application of well logging neutron generators need

[0004] Vacuum arc ion source neutron generators can be divided into cathode grounding and cathode connection positive high voltage according to the potential of the cathode. Compared with cathode grounding, the insulation distance between the accelerating electrode and the ground potential can be The diameter of the neutron generator is reduced by half, but since the anode voltage and trigger voltage are suspended above the cathode voltage at this time, it is necessary to set up a corresponding isolation transformer, which makes the system more complicated and takes up more space. , not conducive to miniaturization

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