Speed of rotation in a vacuum arc centrifuge

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Abstract
Results of measurements made on a vacuum arc centrifuge are reported. The rotational velocity of the plasma column has been deduced by cross correlating the floating potential detected by two Langmuir probes inserted into the plasma. The main result is that the rotational velocity is slightly lower than the Alfven critical velocity, for the four different elements used as cathode material to form the plasma (Mg, Zn, Cd, Pb). A tentative explanation for the results is proposed based on an extension of the global energy balance argument which describes a conventional plasma centrifuge.

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