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Island divertor

A type of device for removing impurities from plasma used in stellarators. In the magnetic field at the edge of the plasma, small magnetic islands — regions of a self-enclosed magnetic field — are created by magnetic coils. Divertors are then installed at the location of the magnetic islands. These are special plates behind which vacuum pumps are placed. The magnetic field of the island leads the impurities to the divertor, from where they are exhausted. The divertor is also designed to withstand high heat loads, thus protecting other plasma facing components and extending the life of the stellarator. Because the stellarator has a variable cross section of the vacuum chamber, island divertors are only installed in certain parts of the chamber and not along the entire chamber.