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Small high-yield deuterium-deuterium neutron generator

A neutron generator, high-yield technology, applied in nuclear technology and application fields, can solve the problems of low output, large volume, complex structure, etc., and achieve the effect of reducing use and management costs, small size, and low operating costs

Inactive Publication Date: 2014-12-24
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a small-scale high-yield deuterium-deuterium neutron generator to solve the problems of low yield, large volume and complex structure of current deuterium-deuterium neutron generators

Method used

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  • Small high-yield deuterium-deuterium neutron generator

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Embodiment 1

[0040] Ion beam energy 100keV, current intensity 100mA, power 10kW, target diameter 150mm, cylinder length 150mm, target area about 1000cm 2 , heat flux 10W / cm 2 , the vacuum inside the vacuum chamber is at 1Pa. The temperature rise of the cooling oil is controlled within 5 degrees, the flow rate of the cooling oil is about 1L / s, the thickness of the pure titanium is 2mm, and the target surface temperature rises about 80 degrees, and the neutron output is 1.3×10 10 n / s.

[0041] Changing to a 95 ceramic self-forming target with a thickness of 10mm, the temperature rise of the target surface is about 110 degrees, and the neutron yield is reduced by about half. However, under the same cooling conditions, the ceramic self-forming target is more resistant to bombardment and can withstand Higher deuterium ion beam bombardment, longer lifetime and lower metal sputtering products. If the intensity of the deuterium ion beam is doubled (200mA), the output can be equivalent to that o...

Embodiment 2

[0043] In Example 1, the self-forming target of pure titanium with a thickness of 2mm is replaced with a ceramic self-forming target with a thickness of 10mm. The vacuum degree inside the vacuum chamber is 0.5Pa, and the deuterium ion beam is increased to 400mA, and the power density deposited on the target surface is increased. 4 times, the neutron yield is doubled, about 2.6×10 10 n / s. The temperature rise of the target surface is 440 degrees, which can still work reliably for a long time for ceramics.

Embodiment 3

[0045] The ion beam energy is 200keV, the current intensity is 1A, the power is 200kW, the diameter of the target surface is 500mm, the length of the cylindrical part is 1000mm, and the target area is about 20000cm 2 , the target surface heat flux is about 10W / cm 2 , the vacuum degree inside the vacuum chamber is 0.1Pa. The temperature rise of the cooling oil is controlled at 5 degrees, the flow rate of the cooling oil is 20L / s, the pure titanium with a thickness of 2mm forms a self-target, the temperature rise of the target surface is about 80 degrees, and the neutron yield is about 5×10 11 n / s.

[0046] If it is replaced with a 95 ceramic self-forming target with a thickness of 10mm, the temperature rise of the target surface is about 110 degrees, and the neutron yield is reduced by about half. However, under the same cooling conditions, the ceramic self-forming target is more resistant to bombardment and can withstand Higher deuterium ion beam bombardment, longer lifetime...

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Abstract

The invention discloses a small high-yield and deuterium-deuterium neutron generator. Modular distributed high-frequency ion sources are adopted and evenly distributed on the outer surface of a ceramic cylinder with the spherical end, and deuterium ion beams distributed evenly are output, wherein the flow intensity of the deuterium ion beams is larger than 1 A, and the single atom proportion is larger than 80%; the deuterium ion beams are accelerated in a cylindrical accelerating electric field with the spherical end and bombard a cylindrical metal or ceramic self-forming target to cause a deuterium / deuterium reaction and then generate neutrons of 2.45 MeV, and the self-forming target is located at the high-potential end and provided with the spherical end. The number of the modular distributed high-frequency ion sources and the area of the self-forming target are not limited, the yield of the neutrons of the deuterium / deuterium reaction is larger than 1011 n / s, and no radioactive pollutants are discharged. The neutron generator is suitable for commercialized application such as the fields of boron neutron capture treatment, neutron radiography, on-line material component neutron detection, neutron irradiation modification and californium neutron source substitute products.

Description

technical field [0001] The invention relates to the field of nuclear technology and application, in particular to a small accelerator deuterium-deuterium neutron generator. Background technique [0002] Small-scale neutron sources are generally divided into radioactive neutron sources and accelerator neutron sources. Radioactive neutron sources use radionuclides to generate neutrons, with low output and short life. The neutron source of the accelerator has a high yield, no neutrons are generated after the power is turned off, it is easy to use, good in controllability and high in safety. [0003] The neutron source of the accelerator uses the deuterium ions generated by the ion source. After being accelerated by the accelerating electric field, higher energy is obtained. Deuterium / deuterium or deuterium / tritium fusion reactions occur on the target, and neutrons are released in the 4π direction. [0004] Although the deuterium / tritium fusion reaction section is larger and th...

Claims

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Application Information

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IPC IPC(8): H05H3/06
Inventor 何小海唐君李彦娄本超张钦龙刘百力刘湾黄瑾李艳
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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