Laboratory Study of Turbulence in Collision-Free Shocks

摘要: In an earlier paper the authors describe a plasma wind tunnel that produces steady collision‐free flow. A shock wave standing in front of magnetic obstacle was produced this The changes magnitude and direction field across were found to be agreement with values predicted using magnetohydrodynamic Rankine‐Hugoniot relations. This work has been extended electric measurements determine over‐all flow patterns. electron density measured laser interferometer, ratio consistent equations. power spectra fluctuations have measured. These are whistler waves front. spectrum shows large variations position highest frequencies appearing near toe wave. amplitude frequency variation is quite similar space data where latter available. proportional proportionality constant equal velocity. absolute turbulence too low absorb all dissipation required for simple model wave‐particle interactions suggested.