الفهرس 
Cover EnglishOnly 14 pages are availabe for public view
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Abstract
Using the quasi-steady-state approximation, a collisional-radiative model(CRM)is developed for laser induced aluminum plasma to calculate the population density distribution of different aluminum energy levels, we also have investigated the effect of electron density, plasma temperature and escape factor on the departure of local thermodynamic equilibrium (LTE). To quantify the departure from the statistical equilibrium Saha decrement has been calculated for each level, we found that the higher energy levels show more statistical equilibrium behavior than the lower levels at the same conditions of electron density and temperature. By calculating Saha decrement at different electron densities we found that L TE conditions were satisfied at higher values of electron densities (10\0 cm”), and higher values of electron densities will be required to maintain the equilibrium at higher values of escape factor. In this model we considered collisional and radiative elementary processes affecting the population and depopulation of the aluminum 28 energy levels, taking into account electron collisional processes only, while atom-atom collisional processes have been neglected. We have developed generic software to solve the model equations and analyze the generated data using java programing language; the developed software can be configured to model similar plasma systems other than aluminum plasma.