LAUSR

In this paper, kappa and Druyvesteyn distributions of electronic velocity are discussed for non-Maxwellian distribution. For accurate temperature and electron density diagnostics of Magnesium plasma, for the Magnesium VIII [Formula: see text] to [Formula: see text] transitions, we calculate kappa averaged collision strengths for [Formula: see text] = 2, 3 and 5 and the Druyvesteyn averaged collision strengths for [Formula: see text] = 1.5, 2 and 3, for temperature between [Formula: see text] and [Formula: see text]. Results indicate that the kappa averaged collision strengths are slightly larger than those for the Maxwellian distribution, and the Druyvesteyn averaged collision strengths are slightly smaller than those for the Maxwellian distribution, furthermore, the averaged collision strengths will be close to those for Maxwellian distribution with increasing [Formula: see text] for the kappa distribution and with decreasing [Formula: see text] for the Druyvesteyn distribution. The excitation rate coefficients are also calculated for Maxwellian and non-Maxwellian distributions. This discussion will be significant in study of plasma for the non-Maxwellian distribution.