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. 2016 Feb 5;55(10):3295–3299. doi: 10.1002/anie.201510983

Figure 1.

Figure 1

Schematic diagram of the experimental setup. Ions are brought into the gas phase, mass‐to‐charge selected and accumulated in the ion trap. Helium droplets can pick up those ions and doped droplets are interrogated using the free‐electron laser.