Mass and energy spectra of a capillary-type indium liquid-metal ion source

Abstract

Measurements of mass spectra and species-selective energy spectra of ions emitted from an indium liquid liquid-metal ion source of the capillary type are reported. The measurements have been performed on a high dynamic range tandem double-focussing mass spectrometer. For the most prominent mass peaks, the energy spectra were recorded with a dynamic range of more than 5 orders of magnitude. From the measurements, differences in the operating mechanisms of needle-type and capillary-type liquid-metal ion sources may be inferred.