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The TCV Tokamak at EPFL’s Swiss Plasma Center © A. Herzog / EPFL The core of a fusion reactor is incredibly hot. Hydrogen that inevitably escapes from it must be cooled on its way to the wall, as otherwise, the reactor wall would be damaged. Researchers from the Dutch institute DIFFER and EPFL’s Swiss Plasma Center have developed a strict measurement and control method for the cooling of very hot particles escaping from fusion plasmas. This milestone for fusion research is published in Nature Communications. “We are going from studying to controlling. This is vital for the future of fusion reactors,” says first author Timo Ravensbergen (DIFFER). “We measure, calculate, and control with incredible speed.” Fusion energy is a promising sustainable energy source. In a fusion reactor, extremely hot hydrogen plasma is kept suspended by magnetic fields. However, there is always a fraction that escapes. To prevent it from damaging the reactor vessel, the escaped hydrogen must

Matthijs van berkelJulia van leeuwenVan berkelMax planck institute for plasma physicsSwiss plasma centerNature communicationsEindhoven university of technologyInstitute of plasma physicsChristian theiler swiss plasma centerEnergy systemsPlasma centerTimo ravensbergenChristian theilerEindhoven universityVrije universiteit brusselPlasma physics