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Miniature high-current neutron generator

A neutron generator and strong current technology, applied in nuclear technology and application fields, can solve the problems that neutrons cannot be effectively used, increase the complexity of the device, etc., meet the requirements of in-situ irradiation and detection, have a simple structure, reduce The effect of heat flux

Active Publication Date: 2019-04-05
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these two patents, the outgoing neutron beams are drawn perpendicular to the direction of the ion beam, and the neutron flux in this direction is generally only about 1 / 2 of the front end of the ion beam, and most of the neutrons produced cannot be effectively utilized
On the other hand, the two patents need to introduce scanning magnetic field, electric quadrupole field and target moving drive mechanism, etc., which increases the complexity of the device

Method used

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  • Miniature high-current neutron generator
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  • Miniature high-current neutron generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see figure 1 , a miniaturized high-current neutron generator of this embodiment adopts a three-electrode extraction acceleration structure, including an ion source 1, a plasma electrode 2, and a vacuum vacuum coaxially connected to the ion source 1 and the plasma electrode 2 through a flange. The cavity 3, the suppression electrode 5 and the target electrode 6 contained in the vacuum cavity 3, the high-voltage feed-in mechanism 7 connected to the vacuum cavity 3, and the collimator 8 embedded in the rear end cover 33 of the vacuum cavity 3 , the ion source 1, the plasma electrode 2, the suppression electrode 5, the vacuum cavity 3 and the collimator 8 are coaxial. Wherein, the ion source 1 , the plasma electrode 2 and the vacuum cavity 3 are grounded, the suppression electrode 5 and the target electrode 6 are connected to a negative high voltage, and the suppression electrode 6 is in a negative bias relative to the target electrode 6 . In this structure, both the ion s...

Embodiment 2

[0051] see Figure 4 , a kind of miniaturized high-current neutron generator of the present embodiment adopts four-electrode extraction acceleration structure, and adopts the neutron generator of three-electrode extraction acceleration structure in the structure and embodiment 1 (referring to figure 1 ) are essentially the same, with the main differences being:

[0052] The neutron generator comprises an ion source 1, a plasma electrode 2, a vacuum chamber 3 connected to the ion source 1 and the plasma electrode 2 by a flange, an extraction electrode 4 contained in the vacuum chamber 3, a suppression electrode 5 and The target electrode 6, the high-voltage feed-in mechanism 7 connected to the vacuum chamber 3, and the collimator 8 embedded in the rear end cover 33 of the vacuum chamber 3, the ion source 1, the plasma electrode 2, and the extraction electrode 4 , the suppression electrode 5, the vacuum cavity 3 and the collimator 8 are coaxial. Among them, the ion source 1 an...

Embodiment 3

[0057] A kind of specific test of the miniaturized high-current neutron generator in the above-mentioned embodiment 1 of the present embodiment:

[0058]The working gas of the ion source 1 is deuterium gas, the voltage of the suppression electrode 5 is -151 ~ -155kV, and the voltage of the target electrode 6 is -150kV; the vacuum chamber 3 is connected to a vacuum pump to maintain a working vacuum of 10 -3 Pa level; use ion plating process to plate a 2.5μm thick titanium film on the surface of the target electrode, and place it in a deuterium absorbing device to make a deuterium titanium target. The deuterium beam drawn from the ion source 1 is accelerated under the action of the electric field gradient between the plasma electrode 2 and the target electrode 6, and bombards the surface of the deuterium-titanium target. When the included angle of the V-shaped structure of the target electrode 6 is 15°, the interaction area between the ion beam and the surface of the target elec...

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Abstract

The invention provides a miniature high-current neutron generator. A three-electrode or four-electrode leading-out acceleration structure is employed. When the three-electrode leading-out accelerationstructure is employed, the neutron generator comprises an ion source, a plasma electrode, a vacuum cavity, a suppression electrode, a target electrode, a high-voltage feeding mechanism and a collimator, wherein the vacuum cavity is coaxially connected with the ion source and the plasma body, the suppression electrode and the target electrode are contained in the vacuum cavity, the high-voltage feeding mechanism is connected with the vacuum cavity, the collimator is embedded to a rear end cover of the vacuum cavity, the ion source, the plasma electrode and the vacuum cavity are connected withground, the suppression electrode and the target electrode are connected with negative high pressure, and the suppression electrode is arranged at negative bias relative to the target electrode. Whenthe four-electrode leading-out acceleration structure is employed, the neutron generator also comprises a leading-out electrode, the leading-out electrode is contained in the vacuum cavity, the voltage of the leading-out electrode is arranged between ground potential and negative high pressure of the target electrode, the target electrode is of a V-shaped structure, and a hot pipe or a fine passage mode is used for cooling. By the neutron generator, high-throughput and high-quality neutron beam conforming to demand can be provided for a mobile neutron camera device, a neutron treatment deviceand the like.

Description

technical field [0001] The invention relates to the field of nuclear technology and application, in particular to a miniaturized high-current neutron generator. Background technique [0002] The deuterium-tritium neutron source uses the ion source to generate a deuterium or deuterium-tritium mixed ion beam. The ion beam obtains a certain amount of energy under the action of an accelerating electric field, bombards the target body, and undergoes a fusion reaction on the target body to generate the required neutrons. . The deuterium-tritium neutron source has a high yield of neutrons, no neutrons are generated after the power is turned off, it is easy to use, has good controllability and high safety. [0003] Compared with compact movable neutron sources, the advantages of large fixed neutron sources are high neutron yield and large irradiation volume. Testing needs. [0004] In neutron radiography, neutron therapy, etc., it is usually required that the neutron flux be as h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H3/06
CPCH05H3/06
Inventor 吴宜灿王文王永峰梁参军张青鵾胡丽琴王芳
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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