October 23, 2016


MIT researchers think we're a step closer to practical nuclear fusion (Dom Galeon, 18 October 2016, World Economic Forum)

Stable nuclear fusion involves a plasma's particle density, its confinement time, and its temperature, reaching a particular value (the "triply product") that keeps the reaction going. The plasma must be extremely hot (more than 30 million degrees Celsius) and it needs to be stable under intense pressure while remaining in a fixed volume. Adjusting the plasma pressure is most of the challenge.

Now, thanks to scientists working on the Alcator C-Mod tokamak fusion reactor at MIT, we are a step closer to controlling it.

The team managed to set a world record for plasma pressure inside the reactor, reaching over 2 atmospheres of pressure for the first time with a temperature of over 35 million Celsius. The record was set on the Alcator C-Mod reactor's final run, which is about to retire after 23 years of use.

Former deputy director of the Princeton Plasma Physics Laboratory, Dale Meade, says the achievement of the Alcator C-Mod program takes us a step closer to a working fusion reactor.

"The record plasma pressure validates the high-magnetic-field approach as an attractive path to practical fusion energy," Meade said, according to MIT News.

Posted by at October 23, 2016 6:29 PM