Figure 1.
Scheme of the hybrid instrument that integrates a high-resolution Thermo Fisher Scientific Orbitrap Velos mass spectrometer with a custom-built cryogenic, triple focusing photofragmentation mass spectrometer. Components of the commercial Velos Pro are grouped inside red dashed lines and include a commericial Thermo Fisher ESI source and LTQ ion trap, which are both part of the embedded photograph but not explicitly shown. The external ESI and linear ion guides provide an independent ion source for species not readily prepared in the commercial instrument (e.g., M+(H2O)n, etc.).