Improvements to a triple helical flow vortex reactor improve the radio-transparent portion of the reactor. A central part is added thereto consisting of an electrically conductive, non-magnetic material. A movable electrode configured to controllably extend into a zone, discharge and retract. A protrusion on the wall optionally aids in the discharge. A feedstock injection unit includes nested pipes: an outer pipe conveys coolants and the inner pipe conveys feedstock. An additional fuel inlet may be connected to an additional reaction chamber connected in series to the reaction chamber. The central part may be porous permitting inward flow of fuel. Slots penetrating the inner wall of the central part enhance the introduction of magnetic and electric fields. An outer shell over the reaction chamber is configured to flow coolant over the outer wall of the reaction chamber.