MIT has started design and construction of a high‐field Tokomak‐like device called “Alcator.” By extrapolation of experimental results, the experiment could achieve confinement times considerably longer than previous Tokomaks, electron temperatures of roughly 5 keV, and electron and ion densities of 1014particles/cm3. These parameters are of thermonuclear interest and, if achieved would allow the study of plasmas with reactor‐like characteristics.

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