A stellarator is a fusion power device that confines plasma using external magnets. It is one of many types of magnetic confinement fusion devices, and among the first to be invented. The name "stella
Example of a stellarator design, as used in the Wendelstein 7-X experiment: A series of magnet coils (blue) surrounds the plasma (yellow). A magnetic field line is highlighted in green on the yellow plasma surface.
Wendelstein 7-X in Greifswald, Germany. Coils are prepared for the experimental stellarator.
Visualization of magnetic field lines in W7-X
A tokamak is a machine which uses a powerful magnetic field generated by external magnets to confine plasma in the shape of an axially symmetrical torus. The tokamak is the leading candidate of magnet
Stellarator
…Spitzer was convinced that the stellarator was matching the Bohm diffusion rate, which suggested it would never be a practical fusion device. The USSR's tokamak design augured a leap in performance. PPPL converted the Model C stellarator to the Symmetrical Tokamak (ST) to confirm or deny its results. ST surpassed…
A USSR stamp, 1987: Tokamak thermonuclear system
Ronald Richter (left) with Juan Domingo Perón (right). Richter's claims sparked off fusion research around the world.
Red plasma in EAST, with visible light radiation dominated by the hydrogen alpha line emitting 656 nm light.
Khrushchev (roughly centred, bald), Kurchatov (to the right, bearded), and Bulganin (to the right, white-haired) visited Harwell on 26 April 1956. Cockcroft stands across from them (in glasses), while a presenter points to mockups of various materials being tested in the newly opened DIDO reactor.