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Abstract

The heat balance is considered of a rotating plasma which is permeable to neutral gas. The neutral particles which enter the plasma and fill its confinement volume are assumed to have small velocities before interacting with ions and electrons. Plasma- netural gas interaction then gives rise to a type of frictional heating of the plasma. The conditions are analysed under which this effect becomes the dominant plasma heating mechanism. It is found that thermonuclear ion temperatures become available at rotational velocities of the order of 10**6 m/s. The result rests on two crucial questions. First, it requires the densities of the neutral gas and the plasma to be chosen such as to avoid critical velocity limitation by plasma neutral gas interaction. This question requires further investigation. Second, an excessive power input is required to reach these temperatures, unless the densities of the plasma and the netural gas are chosen to be small. The power input by far exceeds the thermonuclear energy production, but the present system may still become useful as a neutron source.

Additional information

Authors: LEHNERT B ROYAL INSTITUTE OF TECHNOLOGY, STOCKHOLM (SWEDEN), ROYAL INSTITUTE OF TECHNOLOGY, STOCKHOLM (SWEDEN)
Bibliographic Reference: AVAILABILITY: THE DEPARTMENT OF PLASMA PHYSICS AND FUSION RESEARCH, ROYAL INSTITUTE OF TECHNOLOGY, S-100 44 STOCKHOLM 70 (SWEDEN), MENTIONING REPORT TRITA-PFU-83-06, 1983
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