#tokamak

Lithium – it’s not just for batteries: It can also reduce instabilities in fusion plasmas

You may be most familiar with the element lithium as an integral component of your smart phone’s battery, but the element also plays a role in the development of clean fusion energy. When used on tungsten surfaces in fusion devices, lithium can reduce periodic instabilities in plasma that can damage the reactor walls, scientists have found.

The results, demonstrated by scientists at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) and collaborators on China’s Experimental Advanced Superconducting Tokamak (EAST) found that lithium powder can eliminate instabilities known as edge-localized modes (ELMs) when used to coat a tungsten plasma-facing component called the “divertor” – the unit that exhausts waste heat and particles from plasma that fuels fusion reactions. If left alone, such instabilities can damage the divertor and cause fusion reactions to fizzle.

The results are good news for future devices that plan to use tungsten for their own divertors that are designed to work with lithium.

Read more.