Pulsed magnetic opening of electrons - - - cyclotron resonance jonen sources to generate short, current strong pulses highly charged ions or electrons

摘要

In order from electron cyclotron resonance - - - (ecr) - ion sources with all-round magnetic inclusion of a ecr - heated plasma large, continuous flows of ions to extract, as is known, they must be constructed asymmetrically in such a way, the the axial magnetic inclusion is poorer on the extraction side than on the opposite side, so that ion losses in the direction of extraction lead to larger extracted ion flows. By a sudden lowering of the magnetic inclusion field in the region of the extraction of a with a symmetrical, axial magnet inclusion operated ecr - ion source, i.e, by means of a sudden and complete opening of the magnetic inclusion in the region of the extraction position, the entire plasma for extraction opening suddenly, so that the extracted ion currents suddenly be increased, the large ions current pulse lasts until the plasmavorrart either is exhausted or to the magnetic inclusion is switched on again. The pulse repetition frequency is determined by the build-up time of the plasma after switching on again of the magnetic inclusion. Instead of ions current pulses can also be extracted electrons current pulses.