  Plasma sheath is the non-neutral space charge region that isolates bulk
plasma from boundary. Radio-frequency (RF) sheathes are formed when applying RF
voltage to electrodes. Generally, applied bias is mainly consumed by RF sheath
which shields external field. Here we report first evidence that intense
boundary emission destroys normal RF sheath and establishes a novel type of RF
plasma where external bias is consumed by bulk plasma instead of sheath. Ions
are naturally confined while plasma electrons are unobstructed, generating
strong RF current in entire plasma, combined with unique particle and energy
balance. Proposed model offers possibility for ion erosion mitigation of
plasma-facing component. It also inspires technics for reaction rate control in
plasma processing and wave mode conversion.
