Referring to FIGS. 2B, 3, 4, and 5, the torch chamber 220 of the microwave plasma torch 200 includes the at least one cylindrical chamber section 250 and the conical chamber section 252 extending between the at least one cylindrical chamber section 250 and the outlet of the microwave plasma torch 100. The provision of the at least one cylindrical chamber section 250 and the conical chamber section 252 provides a means to transform the inertia force of gas-particle flows in the flow of at least one plasma-forming gas to a centrifugal force causing a vortex flow pattern of at least one plasma-forming gas (and of the flow of plasma) to develop therewithin. The conical chamber section 252 is shaped to accelerate the flow of the at least one plasma-forming gas along a length thereof for producing a vortex flow of the at least one plasma-forming gas within the torch chamber 220.
