Small directional high-flux neutron generator

A neutron generator and high-throughput technology, applied in nuclear technology and application fields, can solve problems such as poor collimation performance, high cost, and technical complexity, and achieve the effect of unlimited deposition power and high neutron yield

Inactive Publication Date: 2014-05-21
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

[0005] The technical problem to be solved by the present invention is to provide a small-sized neutron generator, which can generate high-flux and high-collimation ratio neutron beams in a specific direction, so as to solve the problem that current high-yield neutron generators either have low flux in a specific direction, Poor collimation performance, or complex technology, bulky and high cost

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 with figure 2 The given long directional target is a single-sided target. In the length direction, the target surface has an inclination angle greater than 0 degrees and less than 5 degrees, and the projection density is evenly distributed. The specific tilt angle is determined by the length of the long directional target and the required directional projection area .

[0036] The ion beam energy is 175keV, the current is 100mA, the target length is 500mm, the target area is 500mm×10mm, the projection area of ​​the neutron beam extraction direction is 10×10mm, and the power density of the target surface is 350W / cm 2 The heat flux density. The line density of the ion source is 2mA / cm.

[0037] Use pure titanium target with a thickness of 1mm and a temperature rise of about 200 degrees; use a copper-based titanium-plated target with a temperature rise of about 10 degrees; use Al 2 O 3 Ceramic target, temperature rise is about 170 degrees, Al 2 O 3 The ceramic...

Embodiment 2

[0041] Such as image 3 with Figure 4 The given long directional target is a cylindrical target. Change the shape of the bombardment area of ​​the cylindrical target so that the bombarded surface of the cylindrical target is inclined in the exit direction to form a cone. Then the projection distribution of the exit surface is a circular ring, cone The inclination angle of the conical surface is set according to the required projection shape and size. Less than 2 Place 10 rectangular Penning ion sources evenly on the circumference of the cylindrical electrode.

[0042] The ion beam energy is 175keV, the current is 300mA, the target length is 500mm, the area is 500mm×30mm, the projection area of ​​the neutron beam extraction direction is in the circle of 10mm in diameter, and the power density of the target surface is 350W / cm 2 The heat flux density. The line density of the ion source is 6mA / cm, and the line density of each ion source is 0.6mA / cm.

[0043] A pure titanium target i...

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Abstract

The invention discloses a small neutron generator which outputs high-flux neutrons in a specific direction. A rectangular penning ion source educes deuterium ions or deuterium tritium mixed ions with a certain width, and the ions bombard a long directional target under the coaxial electric field acceleration so as to generate high-flux neutrons in the axis direction of the target. Because the rectangular penning ion source and the long direction target can be prolonged randomly according to the requirements, the intensity of the ion beam output from the ion source, the power bore by the long directional target and the corresponding neutron yield are greatly improved. The axial projected area of the long directional target is small, so that the neutron flux level is 1 to 2 higher than that of the normal neutron generator in the axial direction; the small directional high-flux neutron generator is applicable to the fields which have direction requirements, such as neutron therapy, picture taking and explosive detection.

Description

Technical field [0001] The present invention relates to the nuclear technology and application fields, in particular to a small accelerator 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 has a high yield of neutron sources, and no neutrons are produced 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 or deuterium-tritium mixed ions produced by the ion source, and is accelerated by an accelerating electric field to obtain higher energy. D / D or D / T fusion reaction occurs on the target, and it is released in the 4π direction. child. When the ion beam bombards the target, it produces high energy deposition. Even under the condition of water cooli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H3/06
Inventor 何小海李彦张慧君娄本超唐君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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