A measure of thermal energy in units of degrees or electron volts.  1 electronvolt is about 10,000 Kelvin. At an atomic level temperature equates to movement of the atoms – hotter plasma has faster-moving ions and electrons in it. High temperatures are important for fusion because fast movement of ions means that during a collision the ions get close enough to fuse.

Temperature is one of the three parameters that make up the triple product, along with number density and confinement time.

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

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