Neutron generator tube

A technology for generating tubes and neutrons, applied in the direction of DC voltage accelerators, etc., can solve the problem of not reaching the sharp cut-off of the neutron pulse waveform, and achieve the effect of shortening the delay time, reducing the secondary electron emission, and reducing the disturbance.

Inactive Publication Date: 2018-01-09
XIAN TECH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the results show that these schemes cannot achieve the sharp cut-off of the neutron pulse waveform at all.

Method used

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the drawings and embodiments.

[0021] A neutron generating tube provided by the present invention includes an ion source 1, a housing 2, a grid 3, an accelerator 4 and a target 5. The shell 2 is made of quartz glass, and the inside is a vacuum cavity. A thin grid 3 is arranged between the ion source 1 and the accelerator 4 in the vacuum cavity. The grid 3 has a larger diameter than the shell Diameter, the plane of the grid 3 is perpendicular to the axis of the neutron generating tube and an annular step is formed outside the housing 2. The grid 3 is made of a metal molybdenum material and is provided with a mesh grid.

[0022] The grid power supply has an ideal square wave waveform, and the amplitude, frequency, and duty cycle are adjustable. The amplitude of the grid pulse voltage is between -1.5KV and +4KV, and the radius of the grid hole is 2.25mm.

[0023] The working principle of the present inve...

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PUM

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Abstract

The invention relates to the technical field of neutron source equipment, specifically to a neutron generator tube, and aims to overcome the problem that waveform of the pulse neutrons generated by bombardment of a target has delay of several or dozens of microseconds and cannot realize sharp cut-off in the prior art. According to a provided technical scheme, the neutron generator tube comprises an ion source, a shell, a gate, an accelerated pole and a target; in a vacuum cavity in the shell, the sheet-like gate is arranged between the ion source and the accelerated pole; the gate is preparedfrom a metal molybdenum material and net-shaped grids are arranged on the gate; the gate is equivalent to ''door'' for controlling an ion beam; in a started state, the ion beam is led from the ion source and is accelerated to bomb the target surface to generate neutrons; and in a closed state, the ion beam is not led from the ion source, and the neutron tube does not generate neutrons. The waveform delay of the neutron pulse generated by the neutron generator tube can be shortened to be within 5[mu]s, so that sharp cut-off can be realized.

Description

Technical field: [0001] The invention relates to the technical field of neutron source equipment, in particular to a neutron generating tube. Background technique: [0002] The neutron generator tube can be applied to many fields, especially in the oil well logging. The neutron generating tube is composed of four parts: an ion source, a shell, an accelerator and a target. The shell is a vacuum chamber. The ion source generates deuterium ions, and the shell plays the role of insulation and sealing, accelerating the deuterium ions to obtain sufficient energy for nuclear reactions, and the tritium (deuterium) target adsorbs tritium (deuterium) gas. Its working principle is: the cold cathode Penning ion source ionizes the deuterium gas to generate deuterium ions. The deuterium ions are accelerated by a strong electric field and hit on the tritium (deuterium) target, and nuclear reaction occurs with the tritium (deuterium) gas in the target to produce neutrons. . Compared with ordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H3/06
Inventor 李三庆郭长立杨鹏飞罗罡李尚哲刘百来张文荣王霞
Owner XIAN TECH UNIV
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