| A new lagrangian structure for subtlety cold relativistic plasma electrodynamics is presented in this thesis.This new formulation uses the fluid velocity in stead of the canonical-momentum Clebsch potential [X.L.Chen and R.N.Sudan]. As applications,it is used to derive new exact conservation laws associated with nonlinear laser wake-field equations, laser field equation and motion equation of electrons in the multidimensional quasi-static approximation.At last ,simulation results are cited to check out the theory and a few papers are introduced to prove the theory in several cases. |
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