Electronic accelerator, also called electronic induction accelerator, is a device used for accelerating electrons by induced electric field
II. Design principle
The design principle is: the ac0 ~ 380V voltage provided by low-voltage AC power supply is converted into high-voltage DC through high-voltage generator. The electron cloud on the firing surface of the hot electron gun accelerates to the electron close to the speed of light under the action of the high voltage electric field. Under the action of the focusing magnet, the electron moves as a beam in the vacuum, and then deflects in the X ~ Y direction under the action of the scanning deflection magnetic field, forming a uniform electron beam exit surface.
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Ⅲ.Product structure chart
Ⅳ.Main product structure
1.High voltage power supply
The equipment adopts three-phase transformer type full wave rectifier high-voltage power supply, the output power can be adjusted freely according to the user's needs, without restrictions in principle, with high reliability, and the output efficiency can reach more than 90%. The energy efficiency ratio is the highest in the current industry application, about 40% of the energy consumption of conventional equipment.
The electron gun adopts pierce two-stage gun structure and single crystal lab6 as extraction material. It has the advantages of low extraction power, high extraction density and strong anti poisoning ability. Its service life can reach 8000 hours and reach the international advanced level in the industry.
3.Electron beam extraction system
In the accelerating tube part of the core component of the electron beam extraction system, our company adopts aluminum oxide ceramic and titanium metal vacuum sealing forming. Compared with the accelerating tube which is currently used in the market, the accelerating tube has the advantages of low gas production and air leakage rate, no decomposition of high molecular organic matter in the use process, strong high pressure and ray resistance, and high service life.
4.Exit window structure
The unique cooling technology of the exit window can achieve a transverse electron beam exit density of more than 1mA / cm. It has the advantage of single window large density exit, and can achieve the high-speed large dose irradiation demand of single exit window.
Electron beam radiation processing technology is to use the high energy electron beam produced by the electron accelerator (0.2mev-10mev) to process the radiated material. This technology has developed rapidly since it was applied in the field of agriculture, and created huge economic benefits. It is different from the traditional mechanical processing and hot processing technology, so it is known as the third revolution of human processing technology. Its characteristic is that the electron beam generated by the electron accelerator has a strong penetration ability, which can be deep into the material molecules for "processing". This "processing" is carried out at room temperature, and its effect on the radiated materials is to inhibit germination, delay breathing, insecticidal sterilization and inspection Epidemic treatment, etc. Because the processors are high-energy rays and highly active intermediates caused by them, rather than molecular thermal movement, they have low energy consumption, no residue and no environmental protection problems. Therefore, electron beam radiation technology is a clean processing technology, and its reaction is easy to control, the processing flow is simple, suitable for industrial and large-scale production. For example, polymer materials can be grafted, polymerized, fissioned or cross-linked to inhibit or stimulate biological growth and effectively kill pests, eggs and pathogens.
II. Principle of High Energy Electron Beam Generation and Radiation Processing
The electron of the high energy electron beam is produced by the electron gun, and the cathode of the electron gun emits electrons. The speed of the continuously generated electrons converging under the action of the high voltage electric field is increased to 0.3-0.7 times of the speed of light. Generally, the diameter of the electron beam is 1-1.5cm. According to different needs, either the electromagnetic lens is used to converge into a finer beam, or the scanning device is used to expand into a fan beam. The interaction between high energy electron beam and matter, ionization or excitation of the treated material, formation of free radicals, free radicals or other activated groups can form a new molecular form. The principle of electron beam radiation processing lies in the destruction of chemical bonds accompanied by the formation of new chemical reactions, decomposition of organic matters or dislocation of atoms. As a process, the basic effect of electron beam treatment is to cause physical effect and change of chemical structure.
Ⅲ.Application of Electron Beam Radiation Processing Technology
Radiation processing includes radiation crosslinking, radiation curing, Radiation vulcanization, radiation degradation, radiation grafting modification.
Radiation crosslinking is a technical means to improve the physical and chemical properties of polymers by forming chemical bonds between the long chains of polymers by electron beam radiation. One kind of products produced by radiation crosslinking technology is heat shrinkable material with special "memory effect", the other kind is radiation crosslinked wire and cable.
Radiation curing is a kind of processing process in which chemical formula (coating, ink and adhesive) is transformed from liquid to solid by means of irradiation. It has the advantages of fast curing speed, uniform surface, low energy consumption and no chemical solvent. It is an environmental protection curing method, covering almost all printing processes.
Radiation vulcanization is the activation of rubber molecules in rubber matrix by high energy electron beam, which produces rubber macromolecular free radicals, crosslinks rubber macromolecules, and forms a three-dimensional network structure. It avoids the disadvantage of uneven cross-linking caused by the uneven distribution of cross-linking agent in the substrate and the influence of temperature gradient in the traditional chemical heat vulcanization. It is very suitable for truck tires, sealing rings and rubber products that are used outdoors for a long time.
Radiation degradation refers to the main chain fracture of polymer under radiation. Radiation degradation technology is mainly used in the treatment of waste plastics and the recycling of rubber products.
Radiation grafting is one of the effective methods to develop new materials with excellent properties or to modify the original materials. Because radiation grafting does not need to add initiator to the system, very pure graft polymer can be obtained, which is an effective method to synthesize medical polymer materials.