Dust plays also an important role in fusion plasma research. Magnetic confinement fusion energy generation requires burning D-T plasma discharges for extended periods, as anticipated for ITER and any Fusion Pilot Plant. However, this presents challenges related to dust formation inside the vacuum chamber, causing impurities and affecting performance. Dust particles, ranging from nano- to millimeter size, can be produced due to damage to plasma-facing components (PFCs) caused by high particle and heat fluxes. In fusion devices like ITER, disruptions caused by dust could significantly damage PFCs, and in-vessel dust inventory limits must be met. In some cases, dust (powders) can play a positive role, such as in-situ wall conditioning, suppression of edge-localized modes, and reduction of heat fluxes to the divertor.