WATER-COOLED PLASMA TORCH Russian patent published in 1997 - IPC

FIELD: plasma engineering, in various plasma- excitation sources with inductive - coupled plasma. SUBSTANCE: water-cooled plasma torch uses coaxially arranged injector, auxiliary flow internal tube, plasma generating flow external tube of the discharge excitation system and water-cooled jacket installed on the external tube of plasma generating flow over the entire length of plasma generation. The length of the plasma generating flow external tube from the injector spray tip to its edge makes up 2 to 4 inside diameters of the plasma generating flow external tube. The water-cooled jacket has a quartz window positioned in the zone of generation of active plasma. The window length makes up 0.5 to 1.5 inside diameter of the water-cooled jacket. The window width is determined by the value of the angle formed by the planes passing through the torch axis, the window vertical boundaries make up 1 to 7 angular degrees. EFFECT: enhanced accuracy of detection of elements at spectral analysis. 2 cl, 2 dwg