Initial Report On The Transition to Turbulence in a Magnetized Plasma Column

Burin, M.J.; Tynan, G.R.; N.A.3Crocker
August 2003
AIP Conference Proceedings;2003, Vol. 676 Issue 1, p207
Academic Journal
Plasma density fluctuations are being investigated experimentally in CSDX, a magnetized plasma column. We show that an effective Reynolds number of the plasma is directly proportional to axial magnetic field strength B and inversely proportional to the ion-neutral collsion frequency, which in our experiment is proportional to the neutral gas pressure. As B is increased, plasma density fluctuations grow in amplitude and evolve to either a multi-mode or turbulent state, depending on the gas pressure. In this final state, correlation dimension estimates of the fluctuations are low for the high pressure case (D ∼ 2), but are high and unsaturated for the low pressure case. Together these results present a familiar but incomplete picture of a plasma turbulent transition that features the breakup of an attractor. © 2003 American Institute of Physics


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