Patent ID: 9524860
Filing Date: 2016-12-20
CPC Classification: H01J

Claim Text:
1. A method for identifying components of a sample comprising: providing a sample to an ion source and generating a plurality of ions from constituent components of the sample; applying a first RF waveform at a first RF amplitude to an ion trap with field resonances while directing the plurality of ions into the ion trap; applying a second RF waveform at a second RF amplitude to the ion trap while focusing the plurality of ions towards a center of the ion trap along a longitudinal axis; ejecting the plurality of ions from the ion trap into a mass analyzer; using the mass analyzer to determine the mass-to-charge ratio of the ions, wherein the first and second RF amplitudes are selected to increase the mass range of ions that are ejected into the mass analyzer and the second amplitude is selected to avoid resonances caused by field non-linearities within the ion trap.