Small Betaron And Its Applications In Non-destructive Testing And Medical Science

In the 20th century, the accelerator plays an important role as the main tool of modern physics, and it becomes the main source of the electronic acceleration and the capture of the beam of particle. At present, the beam of particle is generally used in many fields such as industry, medicine, science and technology.However, most accelerators are bulky, and the operating procedures are complex. The cost is also huge. From this point of view, to develop a small, simple, low-cost accelerator is very important.This thesis describes an induction accelerator that has some outstanding advantages such as small size, simple operation, and low. It is widely used in nondestructive testing, customs inspection system, industrial X-ray imaging detection devices and medicine on radiation treatment of cancer patients.The subject of this thesis relies on the Tomsk Polytechnic University research project called "the creation of charged particle accelerator: the electronic induction accelerator used in medical and non-destructive testing."At first this thesis presents a brief introduction of various accelerators, and based on the comparison to the other betatrons highlights the characteristics of small betatrons. The small electronic sensor accelerator magnets, accelerating cavities, particle injection system, the supply source, offset system and the synchronous control system are introduced detailed.Then the working conditions of accelerator are proposed based on the discussion of the accelerator magnetic:1. The average magnetic field strength in the equilibrium orbit and the magnetic field strength at the orbit must satisfy the proportion of "2:1"2. The gradient of magnetic field is greater than 0 and smaller than 1 for the orbit stability which is decided by the axial and radial focus.The points mentioned above are the necessary conditions to make the electrons accelerate and revolve on the equilibrium orbit, and then make sure not to collide with the accelerating cavity wall. When the working conditions are clear, the acceleration cavity and the magnet system are optimized. Based on the comparison test to the classical equipment, it is proved that the optimized equipment improved the radiation dose intensity, reduced the production costs, increased the working life and broadened the scope of use.Finally, the optimized equipment is used in the nondestructive testing and the detection images are clear, the testing time is shortened and the mobility is improved. When it is used in the medical treatment, the survival rate is increased; the complexity is reduced and the investment in equipment and protective measures are also reduced.