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The Classical Theoretical Investigation of He Ionization in Intense Laser Pulse

Author: YuWeiWei
Tutor: LiuXueShen
School: Jilin University
Course: Atomic and Molecular Physics
Keywords: Classical trajectories Symplectic algorithm He atom in a two-dimensional model Hamilton canonical equation Intense laser field Nonsequential double ionization
CLC: O562.4
Type: Master's thesis
Year: 2009
Downloads: 110
Quote: 1
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Abstract


In this paper, the classical theory of symplectic algorithm , Numerical study of one-dimensional and two-dimensional laser field double ionization of the helium atom . Its main tasks are : 1. Classical trajectories of Hamiltonian systems Symplectic Algorithm and laser interaction with atoms , as well as the initial selection methods and dynamic process statistical average method . Discussed the interaction of the laser with the one-dimensional helium atom . The shape of the laser pulse duration and the pulse envelope ionization of helium atoms ; helium the time evolution of the single-electron energy . 3 . Elliptically polarized laser field two-dimensional helium atom . Mainly discussed the evolution of the probability of the elliptically polarized laser field , the kinetic behavior of the helium atom ; double ionization and single ionization ratio with the change of ellipticity increased ; compared Online polarization and elliptically polarized light , the helium atoms ionization probability and single- electron ionization process . We classic numerical results with the literature helium atom quantum calculation and experimental results compared to the classical numerical results , quantum computing in qualitative agreement with the experimental results .

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CLC: > Mathematical sciences and chemical > Physics > Molecular physics, atomic physics > Atomic Physics > The role of inter- atomic excitation and ionization
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