A Negative Ion Source using a Mercury Pool Cathode

Details A Negative Ion Source using a Mercury Pool Cathode A Negative Ion Source using a Mercury Pool Cathode

Sep 1962

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1962natur.195.1190d&link_type=abstract

Nature, Volume 195, Issue 4847, pp. 1190 (1962).

Physics

Scientific paper

NEGATIVE ion sources are now being used extensively in nuclear research. The demands from these sources are more rigorous than for their positive ion counter-part, and lives are around 100 h for hydrogen, much less for oxygen. Experiments in which the filament of the ion source has been replaced by a mercury cathode (Fig. 1) have given much larger currents (up to 700-amp pulse) and lives. With hydrogen beams, after 600 h operation the source showed only slight wear on the electrodes and indicated an indefinitely long life, while tests with oxygen and with sulphur beams, each for 300 h, indicated no difficulties. These tests were under conditions which gave magnetically analysed ion beams of H-, 15 µamp of O-, 15 µamp and of S-, 8µamp

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