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Small High Yield Deuterium Deuterium Neutron Generator

A neutron generator and high-yield technology, applied in nuclear technology and application fields, can solve the problems of complex structure, low yield, and large volume, and achieve the effects of small volume, reduced use and management costs, and low operating costs

Inactive Publication Date: 2017-04-05
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Effect test

Embodiment 1

[0040] Ion beam energy 100keV, current intensity 100mA, power 10kW, target diameter 150mm, cylinder length 150mm, target area is about 1000cm 2 , Heat flux density 10W / cm 2 , The vacuum inside the vacuum chamber is 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 2mm pure titanium is self-contained, the temperature rise of the target surface is about 80 degrees, and the neutron yield is 1.3×10 10 n / s.

[0041] Replaced with a 95 ceramic self-contained target with a thickness of 10mm, the target surface temperature rise is about 110 degrees, and the neutron yield is reduced by about half. However, under the same cooling conditions, the ceramic self-contained target is more resistant to bombardment and can withstand The higher the deuterium ion beam bombardment, the longer the life, and the lower the metal sputtering product. Double the intensity of the deuterium ion beam (200mA), and the y...

Embodiment 2

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

Embodiment 3

[0045] The ion beam energy is 200keV, the current 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 20,000cm 2 , The target surface heat flux density is about 10W / cm 2 , The vacuum inside the vacuum chamber is 0.1Pa. The temperature rise of the cooling oil is controlled at 5 degrees, the cooling oil flow rate is 20L / s, and the pure titanium with a thickness of 2mm forms the target by itself, the target surface temperature rise is about 80 degrees, and the neutron yield is about 5×10 11 n / s.

[0046] Replaced with a 95 ceramic self-contained target with a thickness of 10mm, the target surface temperature rise is about 110 degrees, and the neutron yield is reduced by about half. However, under the same cooling conditions, the ceramic self-contained target is more resistant to bombardment and can withstand The higher the deuterium ion beam bombardment, the longer the life, and the lower t...

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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 nuclear technology and application fields, in particular to a small accelerator deuterium deuterium neutron generator. Background technique [0002] Small neutron sources are generally divided into radioactive neutron sources and accelerator neutron sources. The radioactive neutron source uses radionuclides to generate neutrons, with low yield and short life. The accelerator neutron source has a high yield, no neutrons are generated after the power is turned off, it is convenient to use, has good controllability and high safety. [0003] The accelerator neutron source uses the deuterium ions produced by the ion source, which is accelerated by an accelerating electric field to obtain higher energy. A deuterium / deuterium or deuterium / tritium fusion reaction occurs on the target, and neutrons are emitted in the 4π direction. [0004] Although the cross-section of deuterium / tritium fusion reaction is larger and the yield is higher, tri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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