Abstract
A new, generalized form of electrostatic, harmonic ion trap mass analyzer, referred to as a Cassinian trap, was introduced in 2009. The present work couples a second order Cassinian trap with a 3D Paul trap in an effort to produce an instrument having the advantages of both (i.e., MS(n) and high mass resolution and accuracy). The present study demonstrates the trapping of ions in the 3D Paul trap and their subsequent transfer to the Cassinian trap. The simultaneous transfer of ions over a broad (factor of 13) mass range is shown. Once in the Cassinian trap, ions can be mass analyzed by Fourier transform means, producing resolving powers as high as 53,000 for the fundamental FID and 140,000 for the third harmonic in 1 s.
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