A double-layer quartz glass tube-type high-voltage unit for small neutron generators

Abstract

The invention belongs to the technical field of neutron generators, and in particular relates to a double-layer quartz glass tubular high-pressure unit used for a small-sized neutron generator, including high-pressure tubes arranged at both ends of a straight-pipe cooling liquid guide pipe (2). The input module (1) and the target electrode (3), the outer surface of the target electrode (3) is a smooth outer casing, the inner part is provided with a target piece (24), and the inner part of the cooling liquid guide pipe (2) is provided with a circulation through which the cooling liquid The flow channel is used for cooling the target piece (24); the high-voltage input module (1) provides high-voltage electricity to the target electrode (3) through the high-voltage connecting rod (20) penetrating inside the cooling liquid guide tube (2). The high-voltage input module (1) is simple and compact, which can avoid high-voltage ignition during high-voltage input, and can carry a high voltage of 130kV; the electrical breakdown voltage of the coolant guide tube (2) reaches 35kV / mm; all of the target electrodes (3) Both the irregular structure and the tip are inside the target electrode (3), which ensures the uniformity of electric field distribution and can effectively suppress secondary electrons.

Description

technical field [0001] The invention belongs to the technical field of neutron generators, and in particular relates to a double-layer quartz glass tubular high-voltage unit for small neutron generators. Background technique [0002] The prominent features of small neutron generators are small size, light weight, easy to move and practical application, which requires that the size of each unit that makes up the generator should be small and the structure should be compact. The main part of the small neutron generator mainly includes four units: ion source, high voltage unit, vacuum unit and electrical unit. The basic working principle is that the ion source generates D + , boosting D through the acceleration unit + After the energy is high, a nuclear reaction occurs when the target is shot, and neutrons are generated. The high voltage that the acceleration unit needs to be loaded is generally above 100kV. Improve D + There are two methods for the energy, one is to place t...

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Problems solved by technology

The first method needs to install the ion source-related power supply, gas supply device, and cooling device on a high potential with the same potential as the ion source, which needs to be insulated, and an acceleration unit and an insulator need to be installed between the ion source and the target. The insulation level in the atmosphere reaches more than 100kV, and the length of each insulator reaches more than tens of centimeters, resulting in a large volume of the whole device

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