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Title: Injection of electrons with predominantly perpendicular energy into an area of toroidal field ripple in a tokamak plasma to improve plasma confinement

Patent ·
OSTI ID:6275713

A method is described of improving confinement properties of a plasma of a tokamak having a toroidal magnetic field direction comprising: (a) providing a ripple field region in the plasma; (b) injecting electrons having predominantly perpendicular energy with respect to the toroidal magnetic field direction of the plasma into the ripple field region for trapping the electrons into the plasma; and, (c) negatively charging the plasma center with respect to the edge by allowing the electrons to grad-B drift vertically toward the plasma interior until they are detrapped, thereby creating a radial electric field at the edge of the plasma.

Assignee:
Dept. of Energy, Washington, DC (United States)
Patent Number(s):
US 5225146; A
Application Number:
PPN: US 7-789519
OSTI ID:
6275713
Resource Relation:
Patent File Date: 8 Nov 1991
Country of Publication:
United States
Language:
English