Generating end plug potentials in tandem mirror plasma confineme

Details Generating end plug potentials in tandem mirror plasma confineme Generating end plug potentials in tandem mirror plasma confineme

1979-03-16

1981-02-24

Cangialosi, S. A.

176 5, G21B 100

Patent

active

042526086

ABSTRACT:
The invention provides a method and apparatus for raising the potential of a magnetic mirror cell by pumping charged particles of the opposite sign of the potential desired out of the mirror cell through excitation, with the pumping being done by an externally imposed field at the bounce frequency of the above charged particles. These pumped simple mirror cells then provide end stoppering for a center mirror cell for the tandem mirror plasma confinement apparatus. For the substantially complete pumping case, the end plugs of a tandem mirror can be up to two orders of magnitude lower in density for confining a given center mirror cell plasma than in the case of end plugs without pumping. As a result the decrease in recirculating power required to keep the system going, the technological state of the art required, and the capital cost are all greatly lowered.

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"Suppression of Ion Cyclotron Instability in Phoenix II Using Electron Transit Time Heating," E. Thompson et al., 10th Ann. Meeting APS, Division of Plasma Physics, (11/68), Miami.

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