Journal article

A new tandem mass spectrometer for photofragment spectroscopy of cold, gas-phase molecular ions

We present here the design of a new tandem mass spectrometer that combines an electrospray ion source with a cryogenically cooled ion trap for spectroscopic studies of cold, gas-phase ions. The ability to generate large ions in the gas phase without fragmentation, cool them to  10 K in an ion trap and perform photofragment spectroscopy opens up new possibilities for spectroscopic characterization of large biomolecular ions. The incorporation of an ion funnel, together with a number of small enhancements, significantly improves the sensitivity, signal stability and ease of use compared with the previous instrument built in our laboratory.


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