Neutron generator with potential suspension at two ends

Abstract

The neutron generator is characterized in that the neutron generator comprises a positive high-voltage platform, an ion source, a positive acceleration gap, a vacuum chamber, a negative acceleration gap, a target and a negative high-voltage platform, and is characterized in that the ion source is mounted on the positive high-voltage platform and is connected with the positive acceleration gap; the positive acceleration gap and the negative acceleration gap are connected through the vacuum chamber, and the target is installed on the negative high-pressure platform and connected with the negative acceleration gap. The ion source and the target are respectively and simultaneously positioned on the positive high-voltage platform and the negative high-voltage platform; the positive high-voltage platform is located in the first metal cavity, and the first metal cavity is filled with a gaseous or liquid insulating medium; the negative high-voltage platform is located in the second metal cavity. The deuterium ion energy of the neutron generator is improved by adopting an ion source and a potential suspension structure at the two ends of the target, so that the neutron yield of the neutron generator is improved under a very compact structure.

Description

technical field [0001] The invention belongs to the field of accelerators. Specifically, it relates to a neutron generator with potential suspension at both ends. Background technique [0002] The compact neutron generator mainly adopts T(d,n) 4 He and D(d,n) 3 He and two nuclear reactions produce neutrons. Compact neutron generators usually have two configurations: one is the ion source suspended at a positive high potential and the target is grounded; the other is the ion source is grounded and the target is suspended at a negative high potential. Since the energy of deuterium ions is directly proportional to the potential difference between the ion source and the target, increasing the accelerating voltage of the neutron generator with the above configuration can increase the neutron yield. However, limited by the high-voltage insulation of the compact neutron generator and the size of its supporting high-voltage power supply, the accelerating voltage of the two confi...

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Problems solved by technology

[0004] (1) After the acceleration voltage increases, the volume of the neutron generator and its supporting high-voltage power supply, isolation transformer, shielding area, etc. will increase significantly;

[0005] (2) After the acceleration voltage is increased, the high-voltage ignition probability of the neutron generator itself and the supporting high-voltage power supply will increase significantly

[0006] In addition, for the compact neutron generator configuration in which the ion source is suspended on a positive high potential, the discharge power supply of the ion source of the existing compact neutron generator also needs to be located at a high potential, and the discharge power supply needs to be powered by an isolation transformer , resulting in difficulty in adjusting the working state of the ion source, increasing the size of the power supply system, and posing potential safety hazards in power consumption

[0007] In addition, existing compact neutron generators sometimes use an accelerating gap composed of multiple electrodes

In the acceleration gap composed of multiple electrodes, when the beam current of the existing neutron generator scatters on the electrodes, it is easy to cause the change of the voltage division coefficient between each electrode, resulting in the voltage fluctuation of each electrode, thereby affecting the transmission of the deuterium ion beam. Increased loss of deuterium ion beam (reduced neutron yield) and increased risk of high-voltage ignition (reduced neutron generator reliability)

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