Indirectly Heated Cathode for the Ion Source of Neutral Beam Injector

摘要

An indirectly heated cathode made of impregnated porous tungsten emitter was prepared for the ion source of neutral beam injector. The cathode was applied to a duoPIGatron hydrogen ion source, where discharge characteristics and the cathode life time were tested. Beam extraction from the source was also carried out. The accumulated discharge time of the cathode was over 20 hours which corresponds to a life time of 2 months for normal use, and the cathode was still usable after the test. (Atomindex citation 13:673144)