Abstract
AbstractA r. f. induced directed force exerted by the application of r. f. voltage on the divertor plate or by introducing r. f. electric field in front of the plate is taken into account for the analysis on sheath‐presheath formation in a very simple manner. The ponderomotive force repels electrons coming to the divertor plate, which results in a reduction of the electron heat flow. The reduction of ionic impact energy to the plate is also expected even for presheath modification combined with positive divertor biasing as well as for successful sheath modification.
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