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Applications of the wave kinetic approach : from laser wakefields to drift wave turbulence

Trines, R. M. G. M. and Bingham, R. and Silva, L. O. and Mendonca, J. T. and Shukla, P. K. and Murphy, C. D. and Dunlop, M. W. and Davies, J.A. and Bamford, R. and Vaivads, A. and Norreys, P. A. (2010) Applications of the wave kinetic approach : from laser wakefields to drift wave turbulence. Journal of Plasma Physics, 76 (specia). pp. 903-914. ISSN 0022-3778

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Abstract

Nonlinear wave-driven processes in plasmas are normally described by either a monochromatic pump wave that couples to other monochromatic waves, or as a random phase wave coupling to other random phase waves. An alternative approach involves a random or broadband pump coupling to monochromatic and/or coherent structures in the plasma. This approach can be implemented through the wave-kinetic model. In this model, the incoming pump wave is described by either a bunch (for coherent waves) or a sea (for random phase waves) of quasi-particles. This approach has been applied to both photon acceleration in laser wakefields and drift wave turbulence in magnetized plasma edge configurations. Numerical simulations have been compared to experiments, varying from photon acceleration to drift mode-zonal flow turbulence, and good qualitative correspondences have been found in all cases.