الفهرس | Only 14 pages are availabe for public view |
Abstract Chapter one introduction into plasma physic to know what is plasma and the model of plasma, also know the meaning of plasma expansion in plasma general before respect it in white dwarf and nano-technology then in the last we mention the self -similar expansion and why use it. Chapter two we will know what the meaning of white dwarf and Using self-similar transformation, the basic set of nonlinear equations is solved numerically. Typical values of white dwarf stars are used to estimate the behavior of the ion number density and ion fluid velocity chapter three the development of accelerators technology offers a new window for the creation of surface nano-structures in an efficient and accurate way. The use of 30 MeV C60cluster ions enables the creation of nano-hillocks of size larger than the ones produced by GeV monoatomic ions. The physical mechanism underlying the realization of such nanostructures is elucidated using a plasma expansion approach. Numerical analysis showed that increasing the ionic temperature (number density) ratios would lead to decrease (increase) the nano-hillocks height. |