High density plasma is produced in a long cylindrical cavity by the excitation of a high frequency whistler wave within the cavity. The cylindrical cavity, and hence the plasma, is imbedded in a high magnetic field, with magnetic lines of force passing axially (longitudinally) through the cavity. The...http://www.google.de/patents/US5225740?utm_source=gb-gplus-sharePatent US5225740 - Method and apparatus for producing high density plasma using whistler mode excitation
