The theoretical design of a linear, pulsed, time-offlight mass ; spectrometer was considered including several possible modes of accelerating ions ; from the source into the field-free drift region where mass separation occurs. ; The best theoretical resolution was obtained when the ions were accelerated by an ; impulse short enough so that no ions left the ionization chamber during the time ; of
... [Show full abstract] its application and then were drawn in to the main accelerating field by a low ; voltage pulse. Loss or ions from the ion chamber was considered, and the mass ; spectra of mixtures of Ne, Ar, and CâHâ were discussed with respect ; to ion loss by thermal diffusion and field penetration. (T.R.H.);