VERFAHREN ZUR GEWINNUNG EINES AUSGANGS- IONENSTROMS

摘要

An output ion current of a single ionic species is produced by reacting ions formed in ionization of a source gas and/or ions extracted from ionization region, in a region in which source gas is located until source ionic species that do not react with the source gas are present. A reactant gas different from the source gas reacts with the ions of the source ionic species to convert the ions of the source ionic species into the single ionic species. The production of output ion current comprised of a single ionic species, involves reacting ions formed in ionization of a source gas in an ionization region (A) and/or ions extracted from the ionization region in a region in which source gas is located, until source ionic species are present that do not react with the source gas. A reactant gas different from the source gas is supplied to a reaction region (C) located outside of the ionization region and in which ions of the source ionic species are present. It reacts with the ions of the one or several source ionic species to convert the ions of the source ionic species into the single ionic species forming the output ion current.