Fusion or evaporation process for sublimation of metals - uses electron plasma generated by high frequency electromagnetic field and resonance inducing magnetic field

摘要

The system submits the solid (2), under vacuum, to a localised heated electron plasma. The electron plasma is obtained through joint action of a high frequency electromagnetic field established inside the vacuum chamber walls (4), and a magnetic field having an amplitude such that the electrons are strongly accelerated by electronic cyclotronic resonances. The electron plasma carries sufficient energy by way of the electrons to locally melt and/or evaporate the solid material. In one mode of operation the solid material is displaced so that it oves into the electron plasa, or alternatively an external magnet may be used to displace the plasma to the (fixed) location of the solid. The surface enegy density is one Joule pe pulse per 0.01 square millietre.