Modeling of high-altitude electromagnetic pulse (HEMP) consists of one self-consistent process. Current density produced by Compton effects of gamma rays not only is the source in Maxwell's equation to produce electromagetic pulse, but also is influenced by electric fields. In this paper, analytical relation of Compton current and local electric field was deduced with reasonable hypotheses in one dimension model. It shows that self-consistent process is equivalent to an effective conductivity and can be combined with original non-self-consistent model. Analytical relation between Compton current and electric filed was verified using particle in cell and finite-difference time-domain methods. Finally, an example of HEMP environments calculated by this means was shown.

Dynamics of one-dimensional hydrogen molecule in two-color intense laser field is studied with classical theory and symplectic algorithm.Classical trajectories are obtained by solving Hamiltonian equations numerically. Probabilities of H₂⁺,H₂²⁺,H,H⁺ are evaluated.Classical dynamics caused by laser intensity,frequency,and phase are illustrated and explained.

Classical trajectory method is used in 1D and 3D models to study classical dynamics of Hydrogen molecular ion (H₂⁺) in intense laser fields. Probabilities of survival, ionization, dissociation and Coulomb explosion and average distance between electron and the mass-center are calculated. It is shown that the 1D model is available for dynamics of hydrogen molecular ion in intense laser fields.