The radial electric field is driven to positive value by offhyphen;axis second harmonic electron cyclotron heating (ECH) in the Compact Helical System lsqb;PlasmaPhysicsandControlledNuclearFusionResearch1988, Nice (International Atomic Energy Agency, Vienna, 1989), Vol. II, p. 411rsqb;. The observed positive electric field is associated with the outward particle flux enhanced with ECH. The enhanced particle flux triggered by the production of the electrons accelerated perpendicularly to the magnetic field with ECH results in the change of the electric field.
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