Regulating Fusia with Fe Atoms and Inert Gases

[Marianp]

What would happen if we in the reactor, which runs Fusia, adding Fe atoms or atoms of inert gases.?
She would regulate Fusia?.

Thank you.

 

[mfb]

"Inert gas" comes from chemistry and describes how the atoms behave in chemistry, if they have all their electrons. In a fusion plasma, this is unlikely. In addition, it does not matter at all, as fusion is a process between two (or more) nuclei.
If the fusion plasma is designed to fuse light elements like hydrogen isotopes, heavier atoms are usually bad - they cannot fuse there, and they tend to radiate away energy which is required for the fusion.