阅读说明：本技术 一种基于电子加速器的多用途终端 (Multipurpose terminal based on electron accelerator ) 是由 宋玉收 柳若琦 侯英伟 胡力元 刘辉兰 于 2020-03-19 设计创作，主要内容包括：本发明一种基于电子加速器的多用途终端,包括辐照靶室、靶室内部的可移动靶、靶室后方的X射线转换靶、控制系统以及数据处理系统；所述辐照靶室为圆柱筒体结构且设置有分支管道,所述控制系统设置在辐照靶室内,所述控制系统包括提升装置和固定装置,所述可移动靶顶端通过提升装置与辐照靶室的顶部相连接,使用时通过操纵提升装置实现辐射靶的收起和放下,通过操纵固定装置使辐射靶保持位置稳定；本发明既可作为单独的辐照靶室使用,也可利用高能加速电子与重靶的轫致辐射作用产生的X射线进行CT成像操作。辐照模式种类多样且转换灵活,既节约了机器采购成本,又提高了实验操作的灵活性。本发明的多用途终端可以广泛的应用于核辐射相关实验中。(The invention relates to a multipurpose terminal based on an electron accelerator, which comprises an irradiation target chamber, a movable target in the irradiation target chamber, an X-ray conversion target behind the irradiation target chamber, a control system and a data processing system, wherein the movable target is arranged in the irradiation target chamber; the irradiation target chamber is of a cylindrical barrel structure and is provided with branch pipelines, the control system is arranged in the irradiation target chamber and comprises a lifting device and a fixing device, the top end of the movable target is connected with the top of the irradiation target chamber through the lifting device, the radiation target is folded and put down by operating the lifting device when the irradiation target chamber is used, and the radiation target is kept stable in position by operating the fixing device; the invention can be used as a single irradiation target chamber, and can also carry out CT imaging operation by utilizing X rays generated by bremsstrahlung action of high-energy accelerated electrons and heavy targets. The irradiation modes are various in types and flexible in conversion, machine purchasing cost is saved, and flexibility of experiment operation is improved. The multi-purpose terminal can be widely applied to nuclear radiation related experiments.)

1. A multi-purpose terminal based on an electron accelerator is characterized by comprising an irradiation target chamber (1), a movable target (2) in the target chamber, an X-ray conversion target (3) behind the target chamber, a control system and a data processing system; the irradiation target chamber is cylinder barrel structure and is provided with the lateral conduit, control system sets up in the irradiation target chamber, control system includes hoisting device and fixing device, the top of movable target top through hoisting device and irradiation target chamber is connected, realizes packing up and putting down of irradiation target through controlling hoisting device during the use, makes irradiation target holding position stable through controlling fixing device.

2. The electron accelerator-based multi-purpose terminal of claim 1, wherein the X-ray conversion target is selected to be tungsten and has a target thickness of 2.5 mm.

3. The electron accelerator-based multipurpose terminal according to claim 1 or 2, further comprising a detector placed in the branch pipe of the irradiation target chamber.

Technical Field

The invention belongs to the technical field of detection and imaging by utilizing nuclear radiation, and particularly relates to a multipurpose terminal based on an electron accelerator.

Background

An electron accelerator is a device for accelerating electrons by utilizing an induced electric field, and is commonly used for generating, accelerating and leading out electron beams in the field of radiation processing. An electron accelerator apparatus generally comprises a beam generator, a beam accelerator, a beam extractor, a controller and other radiation devices. With the continuous development of electron accelerator technology, electron irradiation technology is being applied to more and more research fields, such as industrial gamma ray inspection, material modification in industrial production, food property improvement, research of low-energy photonuclear reaction, medical research, and the like, and can also be used as a radiation source for activation analysis and other aspects.

The irradiation target chamber is one of the devices widely used in the radiation detection experiment at present, and is often used for simulating various irradiation environments to detect the material properties and observe various irradiation products such as auger electrons, X-rays and the like.

Industrial CT refers to nuclear imaging techniques applied in industry. The basic principle is that because the attenuation and absorption characteristics of radiation in the detected object are related to the absorption capacity and material properties of the material to the radiation, it is possible to obtain detailed information of the object interior by the detector array by using the attenuation law and distribution of X-rays or gamma-rays with certain energy and intensity emitted by radioactive nuclides or other radiation sources in the detected object, and finally to display the information in the form of an image by using computer information processing and image reconstruction techniques. Currently, the method is widely applied to convert high-energy electron beams into X rays by using an electron accelerator and a bremsstrahlung conversion target and apply the X rays to industrial CT imaging.

However, the existing technology or design can only realize one of the two functions, and has the defects of single experimental performance and poor applicability, and the equipment function has great limitation. In actual operation, most scientific research laboratories need to select different irradiation means according to different experimental research contents, so that the complexity and cost of experimental operation are greatly increased by the conventional device, and the development of experimental research is further delayed. Therefore, in view of the current situation, there is a need for a multifunctional device terminal that can combine different irradiation means and can conveniently and flexibly perform irradiation mode conversion according to experimental needs.

The inventor is unaware of the prior art solutions in the above-mentioned fields and provides a multi-purpose electron accelerator terminal for combining several functions of an irradiation target chamber, a bremsstrahlung conversion target, and the like into a CT image more conveniently and conveniently.

Disclosure of Invention

The invention aims to provide a multipurpose terminal based on an electron accelerator, which can be used as a single irradiation target chamber and can also be used for CT imaging operation by utilizing X rays generated by bremsstrahlung action of high-energy accelerated electrons and heavy targets.

The purpose of the invention is realized by the following technical scheme:

a multipurpose terminal based on an electron accelerator comprises an irradiation target chamber, a movable target inside the target chamber, an X-ray conversion target behind the target chamber, a control system and a data processing system; the irradiation target chamber is cylinder barrel structure and is provided with the lateral conduit, control system sets up in the irradiation target chamber, control system includes hoisting device and fixing device, the top of movable target top through hoisting device and irradiation target chamber is connected, realizes packing up and putting down of irradiation target through controlling hoisting device during the use, makes irradiation target holding position stable through controlling fixing device.

The target material of the X-ray conversion target is tungsten, and the thickness of the target material is 2.5 mm;

the irradiation target chamber further comprises a detector which is placed in the branch pipeline of the irradiation target chamber.

The invention has the beneficial effects that:

the invention can be used as an independent irradiation target chamber, and can also carry out CT imaging operation by utilizing X rays generated by bremsstrahlung action of high-energy accelerated electrons and heavy targets; the irradiation modes are various and flexible to convert, so that the machine purchasing cost is saved, and the flexibility of experimental operation is improved; the multi-purpose terminal can be widely applied to nuclear radiation related experiments.

The multipurpose terminal based on the electronic accelerator has the advantages that: the equipment can conveniently and simply realize the conversion of the irradiation mode through the operation of folding or putting down the movable irradiation target according to the technical requirements of different experiments. One set of equipment terminal can satisfy the multiple functions that need in the experiment, very big improvement the flexibility of equipment, practiced thrift the cost of equipment purchase.

Drawings

FIG. 1 is a block diagram of an irradiation target chamber.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

the invention aims to disclose a novel multipurpose terminal based on an electron accelerator.

In order to improve the practicability of the equipment in the experiment, increase the diversity and flexibility of the functions of the experimental equipment and reduce the cost of equipment purchase in the experimental preparation stage, the invention provides a new idea of the experimental terminal equipment: a multi-purpose terminal based on electron accelerator is composed of a CT terminal able to convert the high-energy electron beam into X-ray and whose main equipment is the bremsstrahlung conversion target, and a target chamber with movable irradiation target. The design of the invention ensures that two functions of one device can be selected as required, namely, any one of the terminal functions can be independently realized according to the experimental requirements in the experimental process.

The main component of the CT terminal is a heavy target fixed at the rear of the target chamber, and the structure is shown in figure 1 (3). The target is made of tungsten, the diameter of the target is 10cm, and the thickness of the target is 2.5 mm. The condition ensures that the yield of the stray electrons can be almost ignored, and the average energy of the emergent X-rays is still at a higher level, thereby being beneficial to the experiment. The pulsed electron beam passing through the electron accelerator can generate continuous X-rays with high dose after acting with a bremsstrahlung target, and can be applied to experimental research in the fields of CT imaging and the like. When the bremsstrahlung conversion target is applied to CT imaging operation in an experiment, a movable target in an irradiation target chamber is collected by operating a lifting device, then a high-energy electron beam accelerated by an electron accelerator is introduced from an incident branch of the target chamber and is led out from an emergent branch, and the high-energy electron beam passes through the target chamber and then aims at the bremsstrahlung conversion target to generate X rays through interaction with the bremsstrahlung conversion target and perform imaging operation on an object.

The structure of the target chamber of another main component of the equipment is shown in figure 1(1), (2). In order to conveniently use two functions of the terminal in an experiment, the radiation target in the target chamber positioned on the front side is designed to be in a movable form, the supporting and positioning frame of the target is hung on the top cover of the barrel, and the operation of folding and unfolding the target can be realized by lifting and lowering the target bracket. The target chamber body is a cylindrical barrel with the height of 1m and the diameter of 1.5m, and enough space is reserved above the barrel for the radiation target to move according to the needs of experiments. The front end of the cylinder is connected with an accelerator beam pipeline through a metal pipeline, and the rear end of the cylinder is also connected with a metal pipeline for leading out pulse electron beams to the rear. In addition, the two sides of the cylinder body are also provided with a plurality of branch pipelines, and the detector can be placed according to the experimental requirement for observing the irradiation product. In addition, the bottom of the target chamber is connected with a high-vacuum exhaust tube which is connected to an exhaust pump, so that the requirement on the vacuum target chamber in some experiments can be met. When the experimental operation is carried out by utilizing the irradiation target chamber, the movable target in the irradiation target chamber is required to be put down by operating the lifting device, and then the high-energy electron beam accelerated by the electron accelerator is introduced from the incident branch of the target chamber and is led out from the emergent branch after interacting with the target.

The invention is provided below: several embodiments of a multipurpose terminal based on an electron accelerator and a method for implementing the same are provided, but the invention is not limited to the embodiments provided.