i'm trying to make an ionized cloud of vapor to dissipate surface charges, however I don't want that cloud of vapor to settle on the surface to be discharged.
if you don't cage the ions in some kind of magnetic trap or thatlike, you simply can't prevent them from doing exactly that
ions in gasphase will behave approx. like usual gas particles, except that they even repell each other much more than normal gas particles do (due to their identical charge)
so: with the usual standard free pathlength in mind (which unfortunately will become even larger with a better vacuum) your ions will hit the wall in a New York minute, and (mostly) stay there (delocalisation of charge density)
regards
Ingo