Abstract: The inventions described herein are directed to technologies for reforming high temperature feedstreams into clean synthesis gas, more particularly, reactor configurations and methods for reforming pyrogas using non-thermal plasmas. One embodiment provides a plasma reactor comprising: (a) a substantially cylindrical reactor wall having a first closed proximal end and a second open distal end, wherein at least a portion of said wall is configured to comprise a first electrode; and (b) a second elongated electrode electrically separated from the first electrode by an electrical insulator, said electric insulator forming either part or all of the first closed end of the reactor or positioned proximate thereto; and configured to be capable of generating and maintaining a glid ing arc plasma discharge within a zone in said reactor.