TORCH FOR A ROTATING SOURCE OF PLASMA EXCITATION

摘要

A torch consists of an inner tube (1), a coaxially positioned outer tube (2), and at least three electrodes (3), whose tips are evenly spaced around the torch axis inside the outer tube (2). At the end of outer tube (2) there are evenly spaced electrode ports (3), extending in parallel to the torch axis from the outer tube end edge (2). In addition, the torch comprises a cylindrical head (4) sized to fit the outer diameter of the outer tube (2) provided with the same number of electrode ports (3). In another embodiment, the torch is provided with at least six electrodes (3) spaced in two planes perpendicular to the torch axis, while the head (4) has the same number of ports, wherein the difference in depth of every second port corresponds to the distance between the planes.