Researchers Stick Out Their Necks to Understand How Fusion Plasmas Fuel Up

The nuclei that smash together to produce fusion energy in a reactor originate from ionized neutral particles. The edges of fusion devices have large numbers of neutrals available to gain or lose electrons to become ions. These neutrals influence several important features of the plasma, including the rate at which the plasma fuels a reactor. A new pinhole camera system called Lyman-alpha Measurement Apparatus (LLAMA) on the DIII-D tokamak helped researchers better understand these neutrals.

Not Just Disturbance: Turbulence Protects Fusion Reactor Walls

To operate successfully, ITER and future fusion energy reactors cannot allow melting of the walls of the divertor plates that remove excess heat from the plasma in a reactor. These walls are especially at risk of melting when heat is applied to narrow areas. Now, however, an extreme-scale computing analysis indicates that turbulence will reduce that risk.