Small neutron source and preparing method thereof

A neutron source, a small technology, applied in the field of small neutron sources and their preparation, can solve the problems of low ion extraction efficiency, incomplete and accurate plasma parameter diagnosis, low atomic ion content, etc. Simple structure and convenient use

Active Publication Date: 2014-08-06
广州市昊志影像科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the neutron source prepared by using Penning source also has many disadvantages
The ion extraction efficiency of Penningyuan is not high, and the content of atomic ions is not large. The diagnosis of the plasma parameters of Penningyuan is not comprehensive and accurate, especially the plasma density and electron temperature under different discharge conditions.

Method used

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  • Small neutron source and preparing method thereof
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  • Small neutron source and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A small neutron source device mainly consists of the following four parts:

[0039] Ion gun: The ion gun is a component used to generate deuterium ion beams or other ion beams, consisting of CNTs field ion emission electrodes, grids and ceramic bases. The field ion emission electrode is grounded or positive voltage, the grid is connected to negative high voltage, and the ion gun is filled with deuterium gas or tritium gas or other gases. The CNTs field ion emission electrode is to fix the carbon fiber tube array or other one-dimensional nanostructure array grown on the substrate on the field ion emission electrode. Its principle diagram is attached figure 1 shown.

[0040]Insulating sleeve: The insulating sleeve is mainly composed of ceramics or other insulating materials, and its two ends are respectively the ion gun and the anode target. There is a hole in the wall near the end of the anode target for the extraction of the neutron beam (such as figure 2 As shown ...

Embodiment 2

[0045] As a modification of Embodiment 1, the small-sized neutron source can remove the focusing electrode and directly consist of an ion gun, an insulating sleeve and an anode target.

[0046] Ion gun: The ion gun is a component used to generate deuterium ion beams or other ion beams, consisting of CNTs field ion emission electrodes, grids and ceramic bases. The field ion emission electrode is grounded or positive voltage, the grid is connected to negative high voltage, and the ion gun is filled with deuterium gas or tritium gas or other gases. The CNTs field ion emission electrode is to fix the carbon fiber tube array or other one-dimensional nanostructure array grown on the substrate on the field ion emission electrode. Its principle diagram is attached figure 1 .

[0047] Insulating sleeve: The insulating sleeve is mainly composed of ceramics or other insulating materials, and its two ends are respectively the ion gun and the anode target. There is a hole in the wall ne...

Embodiment 3

[0051] The preparation method of the neutron source in embodiment 1 is as follows:

[0052] 1) CNTs arrays or other similar one-dimensional nanostructure materials are grown on silicon wafers or other substrates as field ion emission sources.

[0053] 2) Fix the grown CNTs array on the field ion emission electrode made of stainless steel or other metal materials, and then package the grid composed of metal molybdenum or other materials and the field ion emission electrode together into the ceramic Or other insulating bases to form an ion gun.

[0054] 3) Fix the focusing electrode at a proper position in the insulating sleeve.

[0055] 4) Press the ion gun and the anode target figure 2 Encapsulation shown on both ends of insulating sleeve.

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Abstract

The invention provides a small neutron source and a preparing method of the small neutron source, and particularly relates to the technical field where field-induced ion emission is adopted to generate neutrons. The small neutron source and the preparing method aim to solve the problems that a traditional neutron source is large in size, inconvenient to use, high in cost, limited in application and the like. According to the neutron source, by means of the characteristic of a small radius of curvature of one-dimensional nanostructured materials like a carbon nano tube, the one-dimensional nanostructured materials like the carbon nano tube are used as a field-induced ion emission electrode. By exerting a voltage on a gate electrode, huge negative electricity field intensity is formed near the tip of one-dimensional structures like CNTs, so that deuterium gas or tritium gas is ionized into ions, the ions are speeded up and bombard target materials rich in deuterium or tritium elements, and therefore the ions are recombined and released. The neutron source is simple in structure, small in size, low in cost, free of influence of radiation, convenient to use and the like, and can be widely applied to neutron imaging, element analysis, instrument adjustment, neutron verification and the like.

Description

Technical field [0001] The present invention involves a small neutron source and its preparation methods, especially the technical field of the use of fields to produce neutron. Background technique [0002] The neutron source is an indispensable device that can produce neutron nuclear reactions, neutron diffraction, neutron imaging and other indispensable devices.Freedom neutron is very unstable, it is easy to decay into protons and release electrons and anti -electrical neutrinos, so its average life expectancy is only 15 minutes, and it cannot be stored for a long time.Therefore, in the above applications, neutron must be continuously supplied.At present, there are three main methods of neutron sons: 1. Radioximotopes of homogenic sources: small volume, simple equipment, convenient use.Such as (α, n) the nuclear source uses a nuclear reaction 9BE+α → 12C+N+5.701 mega electronic volt (MEV), and the 238PU, 226RA or 241AM and metal powder of the radiation α rays are evenly mixed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21G4/02
Inventor 陈泽祥许志财谢紫开
Owner 广州市昊志影像科技有限公司
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