Strong Alfven Wave Interactions in a Laboratory Plasma

Authors: M. Abler (Space Science Institute), S. Dorfman (Space Science Institute), C.H.K. Chen (Queen Mary University of London)

A problem of interest in solar wind turbulence is the unexpected observation of residual energy – the difference between the energy in the velocity fluctuations and normalized magnetic field fluctuations. The residual energy should be zero for linear Alfven waves, but is consistently observed to be negative in the solar wind, with magnetic fluctuations dominating. The objective of this project is to investigate the energy partition of strong three-wave interactions as a building block of interactions in the turbulent cascade. Preliminary results from an experimental campaign on LAPD studying three-wave interactions of Alfven waves in an MHD-like regime relevant to the solar wind will be presented.