Reconnection processes in a laser plasma in the presence of counterstreaming electrons

Physics

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Laser-Induced Magnetic Fields In Plasmas, Magnetic Reconnection, Relativistic Plasmas, Fokker-Planck And Vlasov Equation, Self-Focussing, Channeling, And Filamentation In Plasmas

Scientific paper

The magnetic field generated by the Electro-Magnetic Current Filamentation Instability (EMCFI) is shown to develop magnetic islands due to the onset of a fast reconnection instability that occurs on the electron time scale. The main source of free energy for both instabilities is essentially the initial anisotropy of the two counterstreaming electron populations. Numerical results of a 2D-3V Vlasov code are presented and interpreted in terms of the theory of collisionless reconnection in the whistler regime in an anisotropic plasma. These results are relevant to the process of magnetic channel coalescence in relativistic laser plasma interactions and confirm the dynamical role of the magnetic field generated in the wake of the laser pulse first remarked in Ref. [1]. .

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