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Figure 12
TOF spectrum of xenon ions recorded at ℏω = 100 eV. For this measurement, the entire FEL beam with Epulse ≃ 20 µJ pulse energy is put onto the lower mirror of the split-mirrors. Xe(1–15)+ ions are marked by arrows. As TOF ∝ (m/q)1/2 [cf. equation (1)[link]], Xe+ ions have the longest TOFs of all Xe ions considered, which is longer than the time interval ΔtFEL = 5000 ns between two consecutive FEL pulses. Therefore, Xe+ ions appear out of order at TOF(Xe+) − ΔtFEL = 3750 ns. The figure is taken from Schmid (2018BB45).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 3| May 2019| Pages 854-867
https://doi.org/10.1107/S1600577519002236
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