Calculation of averaged collision strength of magnesium for non-Maxwellian distributions in plasma

摘要

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 P-2(1/2)0 to P-2(3/2)0 transitions, we calculate kappa averaged collision strengths for kappa = 2, 3 and 5 and the Druyvesteyn averaged collision strengths for x = 1.5, 2 and 3, for temperature between 5 x 10(4) and 2.5 x 10(5) K. 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 kappa for the kappa distribution and with decreasing x 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.