Your posted response in #24 seemed to imply “which require temperatures of 100 million degrees centigrade” was not a measurement of thermal temperature.
It is.
This physical temperature is much of the problem of containing the plasma.
I’m just pointing out that “we” used keV rather than Kelvin when talking about particle energy in a rarified hot plasma. This is not the kitchen stove we’re talking about. But the media likes big numbers and their readership for the most part has no concept of energy measured in keV, so they love that “millions of degrees” lingo. Yes, it may be thermal energy, but it has little relation to what we encounter in everyday life.