NOVELTY - The device has an electrode formed in a vortex flow/discharge unit that is arranged between two torch nozzles (14). A gas chamber (15) is formed in the nozzles. The discharge unit is connected to a direct current (DC) power supply (PS2). A set of openings (18-1, 18-2) is utilized as an inlet for a cooling agent in a cooling chamber (CM) via holes formed in inner wall (14-2) in contact with plasma jet. Another set of openings (17) is formed in an inner side of a vortex-generating nozzle (13) through the holes of another gas chamber (15).    USE - Gas stabilized plasma jet-generating device for transformation of reactants such as conversion of toxic materials into usable fuels and raw materials into a synthesis gas for energy production. Can also be used as thermal processing device in a nuclear industry for processing waste in nuclear applications. Uses include but are not limited to plasma cutting industry, welding of stainless steel industry, alloys or other metal industry, coating of metals and ceramics industry, smelting and refining of pure metals and alloys industry, high temperature chemical reactions of polymers industry, smelting of ores in metallurgy industry and production of thermal energy industry.    ADVANTAGE - The device has high efficiency. The device realizes transformation of energy, so that energy necessary for the conversion of reactants can be reduced, thus reducing cost of the device, and improving stability of the plasma jet by gas containing wall forming increase in pressure. The device absorbs energy, and a cooling medium acts as reactant by the plasma jet, so that atomic energy produced by the transformation is released with the plasma jet, thus ensuring that conversion of blocking of the energy can be optimally performed.    DESCRIPTION OF DRAWING(S) - The drawing shows a partial sectional view of a gas stabilized plasma jet-generating device.    Cooling chamber (CM)    DC power supply (PS2)    Vortex-generating nozzle (13)    Torch nozzles (14)    Inner wall (14-2)    Gas chambers (15)    Openings (17, 18-1, 18-2)