Numerical Study On Interaction Of Intense Pulsed Ion Beam And Target

Because of being have many advantages for intense pulsed ion beam, it has been pay more attention in the field of materials. IPIB has been used for different motivation for the different effects of the interaction between target and beams with different energy densities. For lower energy density of IPIB, It can be directly used to modify materials; for higher one, it can be used to modify the target and also can be used to deposit film, and to produce nano-size powder. How to control the working references to realize the results for the different target? It needs the guidance theoretically. It is not enough to decide what the parameters of the IPIB should be used by experience. Therefore it is necessary to establish the executing method numerically to deal with the nonlinear problem.From the beginning of create the models according to the fitting results of the waves of magnetically insulated ion diode of the TEMP type accelerator imported from Russia and the ion current density detected by Faraday cup at the focus region, many problems have been discussed, such as the effects of SE emission problems during the irradiation period of target by IPIB, and established a model dealing with mixing ions in the beams; and obtained the evolution profiles of SE and electric field during the beam pulse, found that the field take the role of accelerating and orientation the ions in the beam;The thermal and dynamic effects have been discussed during the irradiation period, and established the one-dimensional and two-dimensional models to describe the ablation process; and calculated the ablation process deeply, obtained the temporal and spatial evolution process of ablation of target. During the ablation of target, target material ablated layer by layer, the ablation velocity reached about 10m/s, it is far less than the ejection speed of the plasma formed by IPIB irradiation target. During the ablation process the scar changed from bowl to well, certainly it affects the ejection direction of plasma. It has been found that among the researching energy densities, the ablation depth and width will not increase while the ablation time near the end of a pulse, it means that the ejection of plasma will finish at the end of a pulse. The temporal and spatial evolution of temperature field of target has been obtained during the IPIB irradiation, the temperature rising rate reaches -10~9 K/s during a pulse.Different effects for impacting on target of IPIB consists of different ratio of ions because of using polyethylene coating or graphite anode of MID of the accelerator have been researched; the range of carbon ion is shorter and the range of proton is longer, therefore the...