When I say “fake fireplace”, I mean something like those structures fueled by fossil methane that produce flame and heat but obviously don’t burn actual wood
Plasma for fusion is at insane temperature and pressure to make fusion possible, to overcome the repulsive force that keeps protons apart by sheer velocity of the colliding nuclei. So you wouldn’t have that kind of plasma in a fireplace generally. But you can get room temperature plasma today without fusion, look up plasma balls… That could make a cool (but not fire-like) fireplace, if it could be engineered into another form factor
Yeah, maybe it would make more sense to just hook up an electrical mimic-fireplace to a fusion reactor’s electrical output, than to use the actual helium plasma exhaust to mimic flames, come to think of it.
I’ve seen some fake fireplaces that use steam and lights to look like fire, you could use steam from waste heat from the fusion reactor?
Plasma is a bit hotter than your gas fireplace flame. Common lighter flame is at about 600 deg C and while it’s possible to create plasma which is nearly ambient temperature in controlled environments it’s generally tens of thousands of degrees (plasma arc welding for example) up to tens or hunderds of million degrees celsius (inside fusion generator).
That’s mostly why fusion energy is so difficult problem to solve in the first place as there’s no materials which could withstand the heat. So, no, it wouldn’t be useful as a fireplace. It would of course radiate heat, but it would also light your (and your neighbours) house on fire, so not that useful.
Not to mention that the plasma arc would be so bright that it would blind you.
Even worse, wavelengths of light change based on temperature so multi million degree plasma will blast you with ultraviolet and X-ray radiation
