Production of intensive negative lithium beam with caesium sputter-type ion source
Date
2018
Authors
Lobanov, Nikolai
Journal Title
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Volume Title
Publisher
Elsevier
Abstract
Compounds of lithium oxide, hydroxide and carbonate, mixed with silver, were prepared for use as a cathode in
caesium-sputter ion source. The intention was to determine the procedure which would produce the highest
intensity negative lithium beams over extended period and with maximum stability. The chemical composition
and properties of the samples were analysed using mass-spectrometry, optical microscopy, Scanning Electron
Microscopy (SEM), Energy Dispersive X-ray Analyses (EDX) and Raman spectroscopy. These analyses showed
that the chemical transformations with components resulted from pressing, storage and bake out were qualitatively
in agreement with expectations. Intensive negative lithium ion beams>1 μA were delivered using
cathodes fabricated from materials with multicomponent chemical composition when the following conditions
were met: (i) use of components with moderate enthalpy of formation; (ii) low moisture content at final stage of
cathode production and (iii) small concentration of water molecules in hydrate phase in the cathode mixture.
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Source
Nuclear Instruments and Methods in Physics Research: Section B
Type
Journal article