| We report on new level-resolved calculations for the dielectronic recombination and collisional excitation of the low charge states of argon. |
| The uncertainty budget is nearly complete, with work progressing on the collisional frequency shift. |
| Such excitation leads not only to collisional de-excitation of excited atoms but also to additional excitation of excited atoms. |
| The collisional thermalization between electrons and ions is very slow, due to the large difference in their masses, and it occurs on a millisecond timescale. |
| We also introduce collisional phenomena such as thermal diffusion and heat-exchange between ions and electrons. |
| With the collisional history of Mars, you're dealing with a history of billions of years. |
