SAMOP 2021 – scientific programme
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MO: Fachverband Molekülphysik
MO 9: Poster 2
MO 9.14: Poster
Friday, September 24, 2021, 17:30–19:30, P
Method of Kinetic Energy Reconstruction from Ion-Time-of-Flight Spectra — •Aaron Ngai1, Katrin Dulitz1, Marcel Mudrich2, and Frank Stienkemeier1 — 1Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C
We present a method which makes use of ion trajectory simulations to reconstruct ion-kinetic-energy (KE) distributions from ion-time-of-flight (TOF) spectra. Sufficient conditions for a unique calibration to experimental parameters are presented, where the calibrated simulation extrapolates to a set of energy-dependent TOF basis functions, allowing conversion between TOF and KE coordinates. We demonstrate this reconstruction method on a recent XUV-UV pump-probe laser experiment on helium nanodroplets at the free-electron laser FERMI in Trieste [1], where relaxation from the 1s3p/1s4p droplet absorption band was time-resolved, using a Wiley-McLaren-type ion-TOF spectrometer in combination with a magnetic bottle electron spectrometer [2,3].
[1] J. D. Asmussen et al. Phys. Chem. Chem. Phys. advance article (2021).
[2] W. C. Wiley and I. H. McLaren. Rev. Sci. Instrum. 26, 1150 (1955).
[3] J. H. Eland et al. Chem. Phys. 327, 85 (2006).