Title of article
Production of Group IIA atomic and molecular negative ion beams in a cesium-sputter negative ion source
Author/Authors
Calabrese، نويسنده , , D and Covington، نويسنده , , A.M and Thompson، نويسنده , , J.S، نويسنده ,
Pages
4
From page
192
To page
195
Abstract
The results of an investigation on the production of Group IIA atomic and molecular negative ion beams formed in a cesium-sputter negative ion source are presented. The sputtering material was formed by pressing pellets of stoichiometric mixtures of the Group IIA element carbonates and 10% copper powder. Negative ions of several alkaline-earth elements and their oxides have been observed. Beam intensities as high as 180 pA have been observed for Sr− and 20 nA for SrO−.
Journal title
Astroparticle Physics
Record number
1998932
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