Pulse Characterization by Frequency-Resolved Optical Gating for Velocity Map 
Imaging of Xenon

Kokh, Stepan

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Pulse Characterization by Frequency-Resolved Optical Gating for Velocity Map Imaging of Xenon

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Kokh, Stepan
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Citation

Kokh, S. (2022). Pulse Characterization by Frequency-Resolved Optical Gating for Velocity Map Imaging of Xenon. Bachelor Thesis, Ruprecht-Karls-Universität, Heidelberg.

Cite as: https://hdl.handle.net/21.11116/0000-000A-D3B2-E

Abstract

A velocity map imaging (VMI) setup, which will be applied in the future to studying
low-intensity strong-field ionization and the nuclear transition of the 229mTh isomer, is
tested by multi-photon ionization (MPI) of xenon and the electron energy distribution
is reconstructed. The ultra-short ionizing laser pulse of a 100MHz frequency comb is
characterized by second harmonic intensity frequency-resolved optical gating (FROG)
and interferometric FROG (iFROG). A good agreement of both methods is found, and
a pulse duration of 183 fs is retrieved. The peak intensity of the ionizing pulse during
MPI is calculated from the measured intra-cavity power and the retrieved pulse shape,
which allows a theoretical characterization of the MPI process and a comparison to the
experimental results.