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Chaotic transport and damping from θ-ruffled separatrices.
A A Kabantsev1, Daniel H E Dubin, C F Driscoll
1Department of Physics, University of California, San Diego, California, USA.
Physical Review Letters
|January 15, 2011
Summary
Experiments reveal chaotic separatrix crossings in pure electron plasmas significantly impact transport and wave damping. These crossings, driven by plasma rotation and wave fluctuations, are now quantitatively characterized.
Area of Science:
- Plasma Physics
- Nonlinear Dynamics
Background:
- Trapping separatrices arise from variations in confinement fields.
- Neoclassical transport theory examines collision-induced separatrix crossings.
Purpose of the Study:
- To quantitatively characterize transport and wave damping effects from chaotic separatrix crossings in pure electron plasmas.
Main Methods:
- Experiments on pure electron plasmas.
- Analysis of equilibrium plasma rotation across θ-ruffled separatrices.
- Investigation of wave-induced separatrix fluctuations.
Main Results:
- Chaotic separatrix crossings were quantitatively characterized.
- A broad range of transport effects were observed.
- Wave damping effects associated with these crossings were identified.
Conclusions:
- Chaotic separatrix crossings are a significant factor in pure electron plasma behavior.
- Understanding these crossings is crucial for predicting plasma transport and wave interactions.
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