Flux of hot electrons directed away from the waveguiding plasma-dielectric
interface was experimentally observed in large-area microwave discharges. T
he energy of these electrons attains values of some 60 eV, and they are bel
ieved to be originating from the resonantly-enhanced electric field region
localized near the dielectric. The phenomenon appears to play a significant
role in discharge heating mechanism, which is demonstrated by plasma param
eter profiles. (C) 2000 American Institute of Physics. [S0003-6951(00)03010
-2].