27 citations · 85 across the 5 of their papers we have counts for
5 papers
XCALIB: a focal spot calibrator for intense X-ray free-electron laser pulses based on the charge state distributions of light atoms
Koudai Toyota, Zoltan Jurek, Sang-Kil Son +7
We develop the XCALIB toolkit to calibrate the beam profile of an X-ray free-electron laser (XFEL) at the focal spot based on the experimental charge state distributions (CSDs) of…
Interplay between relativistic energy corrections and resonant excitations in x-ray multiphoton ionization dynamics of Xe atoms
Koudai Toyota, Sang-Kil Son, Robin Santra
In this paper, we theoretically study x-ray multiphoton ionization dynamics of heavy atoms taking into account relativistic and resonance effects. When an atom is exposed to an int…
Spatio-temporal interference of photo electron wave packets and time scale of non-adiabatic transition in high-frequency regime
Koudai Toyota
The method of the envelope Hamiltonian [K. Toyota, U. Saalmann, and J. M. Rost, New J. Phys. {\bf 17}, 073005~(2015)] is applied to further study a detachment dynamics of a model n…
The envelope Hamiltonian for electron interaction with ultrashort pulses
Koudai Toyota, Ulf Saalmann, Jan M. Rost
For ultrashort VUV pulses with a pulse length comparable to the orbital time of the bound electrons they couple to we propose a simplified envelope Hamiltonian. It is based on the…
Siegert pseudostate perturbation theory: one- and two-threshold cases
Koudai Toyota, Toru Morishita, Shinichi Watanabe
Perturbation theory for the Siegert pseudostates (SPS) [Phys.Rev.A 58, 2077 (1998) and Phys.Rev.A 67, 032714 (2003)] is studied for the case of two energetically separated threshol…