Development Of Simulation Software On Intense Ion Beam Envelope And Design Of Intense Neutron Generator

In this thesis, the current situation and important applications of D-T/D-D intense neutron generator are summarized.The transport theory of high-current ion beam is investigated, a numerical simulation method of the beam envelope and a computer-aided-design program called IONB1.0have been developed by means of the envelope equation.Key elements of the intense neutron generator are designed, and the physical design of400kV intense neutron generator is completed.First, the transport theory of high-current ion beam is studied and summaried. An updated program called IONB1.0for simulating envelope of high current ion beam is designed, The program is based on the K-V equation, and combined simulation results of the electric field distribution of accelerating column. At the same time,a visual interactive interface of IONB1.0program is developed using FORTRAN,VB and Matlab mixed programming.Then, envelopes of40mA/D ion beam in400kV intense neutron generator are simulated using IONB1.0software.A design of400kV intense neutron generator is completed.Two transport lines of40mA/D ion beam are presented,one is non-analysis beam transport line, another is analysis beam transport line. According to simulation results of40mA/D beam envelopes, the parameters of the transport elments of the neutron generator are determined.Finally, key elments of intense neutron generator are studied. Using the Poisson/Superfish and IONB1.0,the design of high-voltage electrode, ion source, accelerating column, space charge lens, triple quadrupole magnetic lens and analysis magnet have been completed.Meanwhile, processing progress of these components is introduced simply.