@sonhouse saidPhys.org gives Celsius( though the Scientitst probably used Kelvin, but what is 273 degree offset in that oder?)
https://phys.org/news/2020-12-korean-artificial-sun-world-sec-long.html
Stupid title. Why didn't they just say fusion experiment?
But that is a new record.
Is that degrees F or degrees C? The article didn't say.
Kudos for the Korean scientists to manage 20 seconds!
@Ponderable
The next question is: did the plasma quench itself for whatever physics is going on or did they just stop at 20 seconds to limit damage?