opensource wrote: Thanks James, you always clear things up…
Glad to be of service…
opensource wrote: Can some gas be used to slow the x-rays to decrease reactivity and cooling?
X-rays always travel at the speed of light, c.
To have a chance for a significant proportion of the X-rays be re-absorbed by the plasma before leaving it you need something the size of a star (well not quite – but you get the idea)