Reduction of sheath electric field by multidielectric slabs in a plasma

The properties of plasma sheaths developed along plasma boundaries are inve stigated analytically, assuming that dielectric slabs are present between e lectrodes. A collisionless plasma is confined by two planar electrodes. Pla nar dielectric slabs with finite thickness partition the plasma into many p ieces. The sheath electric field is inversely proportional to the sum of 2( 1 + l) + Delta/epsilon lambda, where Delta and epsilon are the total thickn ess and the relative dielectric constant respectively of the dielectric sla bs, l is the number of slabs and lambda is the Debye length of the high-den sity plasma. In this context, the plasma sheaths may easily be controlled b y appropriate choices of dielectric materials and their size.