CN210405755U

CN210405755U - Low-energy irradiation linear accelerator

Info

Publication number: CN210405755U
Application number: CN201920880169.9U
Authority: CN
Inventors: 刘广超
Original assignee: Cgn Zhongke Hi Wits Technology Development Co ltd
Current assignee: Cgn Irradiation Technology Co ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-04-24
Anticipated expiration: 2029-06-12

Abstract

A low-energy irradiation linear accelerator comprises an electron gun, a magnetron, an accelerating tube, a load absorption tube, a vacuum drift pipeline, a deflection magnet and a scanning box, wherein the electron gun, the accelerating tube, the vacuum drift pipeline, the deflection magnet and the scanning box are sequentially connected; the front end and the rear end of the accelerating tube are respectively connected with an input coupler and an output coupler; the upper end of the input coupler is connected with the magnetron through a flange; the upper end of the output coupler is connected with the load absorption through a flange; the outer side of the accelerating tube is connected with a focusing coil in a surrounding manner; and the outer side of the vacuum drift pipeline is connected with a beam expanding coil in a surrounding manner. Compared with the prior art, the utility model discloses a low energy irradiation linear accelerator is the power source through adopting the magnetron, adopts reasonable accelerating tube, makes the electron beam energy of output both can reach megavolt level, through focus coil, expand beam coil and the accurate control electron beam size of deflection magnet, and this accelerator has small simultaneously again in addition, compact structure and the advantage of the protection of being convenient for.

Description

Low-energy irradiation linear accelerator

Technical Field

The utility model relates to an electron linear accelerator technical field for the irradiation specifically indicates a low energy irradiation linear accelerator.

Background

In the aspects of radiation disinfection and sterilization, food preservation and the like, the electron linear accelerator has good killing effect on microorganisms, has good degradation effect on drug residues in food, and has good benefit in the aspect of food irradiation processing. Compared with the source, the electron linear accelerator has a series of advantages of low source construction cost and operation cost, good process property and product quality and the like under the same processing capacity, and particularly has more advantages for irradiating frozen food because the irradiation time is short, and the irradiated food is not easy to generate peculiar smell.

The electron accelerator can also be widely applied to the aspects of material modification, sewage treatment, coating curing and the like. For example, after the semiconductor material for producing high-power electronic components is irradiated by electron beams, the conductivity and the switching performance are greatly improved; the sewage is treated by electron beam irradiation, so that pollutants in the water are decomposed or degraded, and harmful microorganisms are denatured, thereby achieving the aim of disinfecting and purifying the wastewater; the coating radiation curing refers to a process of utilizing electron beams to initiate a specifically prepared active liquid component to be rapidly converted into a solid at normal temperature, such as various packaging boxes, indoor ground soil layers and the like.

At present, a low-energy accelerator comprises a ground nano accelerator and an ELV accelerator, wherein the two accelerators can output megavolt-level rays and have high power, but the accelerators are large in size and need to build a special radiation shielding factory building, and the ordinary transformer type accelerators are difficult to achieve megavolt-level energy.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to above-mentioned prior art not enough, and provide a low energy irradiation linear accelerator.

In order to solve the technical problem, the utility model discloses a technical scheme is:

a low-energy irradiation linear accelerator comprises an electron gun, a magnetron, an accelerating tube, a load absorption tube, a vacuum drift pipeline, a deflection magnet and a scanning box, wherein the electron gun, the accelerating tube, the vacuum drift pipeline, the deflection magnet and the scanning box are sequentially connected; the front end and the rear end of the accelerating tube are respectively connected with an input coupler and an output coupler; the upper end of the input coupler is connected with the magnetron through a flange; the upper end of the output coupler is connected with the load absorption through a flange; the outer side of the accelerating tube is connected with a focusing coil in a surrounding manner; and the outer side of the vacuum drift pipeline is connected with a beam expanding coil in a surrounding manner.

Furthermore, the accelerating tube is of a disc and waveguide structure, seven accelerating cavities are arranged in the accelerating tube, adjacent accelerating cavities are separated through discs, and the length size of the divided accelerating cavities is increased by 1.2 times; the first to sixth accelerating cavities are beam bunching cavities, and the seventh accelerating cavity is a light speed cavity.

Further, the input coupler comprises an input coupler inclined waveguide and an input coupling cavity, and the magnetron is communicated with the inside of the accelerating tube through the input coupling cavity.

Further, the output coupler comprises a coupler ramp and an output coupling cavity, and the load absorption is communicated with the inside of the accelerating tube through the output coupling cavity.

Furthermore, the electron gun, the accelerating tube, the vacuum drift pipeline, the deflection magnet and the scanning box are connected in sequence through flange connection.

Furthermore, a layer of titanium film is covered on the outlet end face of the scanning box.

Furthermore, cooling water jackets are arranged around the outsides of the magnetron, the accelerating tube, the focusing coil, the beam expanding coil and the deflection magnet, and the inlet ends of the cooling water jackets are connected with a water cooling unit.

Compared with the prior art, the low-energy irradiation linear accelerator is a novel accelerator, and increases the output power by adopting a magnetron as a power source and adopting a reasonable accelerating tube, so that the energy of the output electron beam can reach megavolt level, and the power is more than 1 KW; through the accurate control electron beam size of focus coil, beam expanding coil and deflection magnet, make the output that the electron beam can be even to by the irradiation thing on, this accelerator has small simultaneously again in addition, compact structure and the advantage of the protection of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic diagram of the structure of the accelerating tube connected to the input coupler and the output coupler;

the device comprises an electron gun 1, an electron gun 2, a magnetron 3, an accelerating tube 4, a load absorption 5, a vacuum drift pipeline 6, a deflection magnet 7, a scanning box 8, an input coupler 9, an output coupler 10, a focusing coil 11, a beam expanding coil 12, a titanium film 13, a cooling water jacket 14, a water chiller 15, a modulator 16, a console 31, a disk 32, a beam focusing cavity 33, a light speed cavity 81, an input coupler inclined waveguide 82, an input coupling cavity 83, an input coupler connecting flange 91, an output coupler inclined waveguide 92, an output coupling cavity 93 and an output coupler connecting flange.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 and 2, the low-energy irradiation linear accelerator includes an electron gun 1, a magnetron 2, an accelerating tube 3, a load absorber 4, a vacuum drift tube 5, a deflection magnet 6, and a scanning box 7, wherein the electron gun 1, the accelerating tube 3, the vacuum drift tube 5, the deflection magnet 6, and the scanning box 7 are sequentially connected, and in this embodiment, the electron gun 1, the accelerating tube 3, the vacuum drift tube 5, the deflection magnet 6, and the scanning box 7 are sequentially connected by a flange connection method.

The front end and the rear end of the accelerating tube 3 are respectively connected with an input coupler 8 and an output coupler 9; the input coupler 8 comprises an input coupler inclined waveguide 81, an input coupling cavity 82 and an input coupler connecting flange 83, the upper end of the input coupler 8 is connected with the magnetron 2 in a flange connection mode, and the magnetron 2 is communicated with the inside of the accelerating tube 3 through the input coupling cavity 82; the output coupler comprises an output coupler inclined waveguide 91, an output coupling cavity 92 and an output coupler connecting flange 93, the upper end of the output coupler 9 is connected with the load absorber 4 in a flange connection mode, and the load absorber 4 is communicated with the inside of the accelerating tube 3 through the output coupling cavity 92.

The outer side of the accelerating tube 3 is connected with a focusing coil 10 in a surrounding manner, and the focusing coil 10 is used for providing focusing force for electron beams and preventing the electron beams from being scattered and lost; the outer side of the vacuum drift pipe 5 is connected with a beam expanding coil 11 in a surrounding mode, and the beam expanding coil 10 is used for expanding the size of an electron beam group, so that the uniformity of an electron beam striking an irradiated object is improved; the deflection magnet 6 is arranged between the vacuum drift pipe 5 and the scanning box 7, and the deflection magnet 6 is used for sweeping the beam so that the beam can be uniformly output to an irradiated object 12; the outlet end face of the scanning box 7 is covered with a layer of titanium film 12, and the end face of the scanning box 7 is provided with a titanium film 13 to isolate the atmosphere.

In this embodiment, the accelerating tube 3 is a disk and waveguide structure with a working frequency of 2998MHz, seven accelerating cavities are arranged inside the accelerating tube, adjacent accelerating cavities are separated by disk 31, and the length of the divided accelerating cavities is increased by 1.2 times; wherein the first to sixth accelerating cavities are beam focusing cavities 32, the seventh accelerating cavity is a light velocity cavity 33, and the accelerating tube 3 is designed to make the energy of the electron beam be 1 MeV.

In this embodiment, all be provided with cooling water jacket 13 around magnetron 2, accelerating tube 3, focus coil 10, expand coil 11 and deflection magnet 6 outside, the entrance end connection of cooling water jacket 13 has water cooling unit 14, because magnetron 2, accelerating tube 3, focus coil 10, expand coil 11 and deflection magnet 6 equipment can produce a large amount of heats in the course of the work, provides the cooling water through setting up water cooling unit 14 and cools down.

In this embodiment, a modulator 15 and a console 14 are further disposed outside the accelerator, the modulator 1 is electrically connected to the magnetron 2 and the electron gun 1, the modulator 15 provides pulse high voltage with a certain shape for the magnetron 2 and the electron gun 1, and is a high-power pulse power supply, the magnetron 2 converts electric energy into energy of microwaves, and outputs high-power microwaves with a frequency of 2998 MHz; the console 14 provides control signals to the accelerator while monitoring the operating conditions of the entire accelerator.

The working principle is as follows: starting an accelerator, wherein a modulator 15 provides a pulse power supply for a magnetron 2 and an electron gun 1, the magnetron 2 converts electric energy into microwave energy and enters an accelerating tube 3, and an electromagnetic field is established in the accelerating tube 3 after the microwave enters the accelerating tube 3; at this time, the electron gun 1 emits an electron beam having a certain shape and an initial velocity, wherein a part of the microwaves are absorbed by the electron beam, a part of the microwaves are consumed on the tube wall of the accelerating tube 3, and the rest of the microwaves are absorbed by the absorbing load 4; the electron beam with the obtained energy enters a vacuum drift tube 5 from an accelerating tube 3; the 6 magnet that deflect that connect through 5 exit ends in vacuum drift pipeline make electron beam evenly export to by the irradiation thing on, the utility model discloses in adopt the microwave to come electron beam with higher speed for the electron beam energy is 1MeV, and power is greater than 1kW, and its pulse current intensity exceeds 1A.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications or changes without departing from the spirit of the present invention.

Claims

1. A low energy irradiation linear accelerator is characterized in that: the device comprises an electron gun, a magnetron, an accelerating tube, a load absorption tube, a vacuum drift pipeline, a deflection magnet and a scanning box, wherein the electron gun, the accelerating tube, the vacuum drift pipeline, the deflection magnet and the scanning box are sequentially connected; the front end and the rear end of the accelerating tube are respectively connected with an input coupler and an output coupler; the upper end of the input coupler is connected with the magnetron through a flange; the upper end of the output coupler is connected with the load absorption through a flange; the outer side of the accelerating tube is connected with a focusing coil in a surrounding manner; and the outer side of the vacuum drift pipeline is connected with a beam expanding coil in a surrounding manner.

2. The low energy irradiation linear accelerator of claim 1, wherein: the accelerating tube is of a disc and waveguide structure, seven accelerating cavities are arranged in the accelerating tube, adjacent accelerating cavities are separated through discs, and the length size of the divided accelerating cavities is increased by 1.2 times; the first to sixth accelerating cavities are beam bunching cavities, and the seventh accelerating cavity is a light speed cavity.

3. The low energy irradiation linear accelerator of claim 1, wherein: the input coupler comprises an input coupler inclined waveguide and an input coupling cavity, and the magnetron is communicated with the inside of the accelerating tube through the input coupling cavity.

4. The low energy irradiation linear accelerator of claim 1, wherein: the output coupler comprises a coupler ramp wave and an output coupling cavity, and the load absorption is communicated with the inside of the accelerating tube through the output coupling cavity.

5. The low energy irradiation linear accelerator of claim 1, wherein: the electron gun, the accelerating tube, the vacuum drift pipeline, the deflection magnet and the scanning box are connected in sequence through flange connection.

6. The low energy irradiation linear accelerator of claim 1, wherein: and a layer of titanium film is covered on the outlet end face of the scanning box.

7. The low energy irradiation linear accelerator of claim 1, wherein: and cooling water jackets are arranged around the outsides of the magnetron, the accelerating tube, the focusing coil, the beam expanding coil and the deflection magnet, and the inlet end of each cooling water jacket is connected with a water cooling unit.