Ion withdrawal studies of the quadrupole ion storage trap (QUISTOR). Part I. Characterization of the magnitude of the ion trapping potential well and the location of extractable ions

Abstract

Characterization of the ion trapping potential well depth, as a function of ion m/e ratio, has been effected by a study of ion withdrawal induced by extractive pulses applied to the end-cap electrodes. A comparison has been made of the relative efficiencies of three methods of ion withdrawal from the QUISTOR. A model has been developed from the movement of the calculated potential barrier during ion withdrawal. This model permits one to deduce the location of extractable ions in the QUISTOR.