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Mode selective control of drift wave turbulence
C Schröder1, T Klinger, D Block
1Institut für Physik, Ernst-Moritz-Arndt Universität, Greifswald, Germany.
Physical Review Letters
|June 21, 2001
Summary
Experiments show that rotating current profiles can synchronize drift wave turbulence in magnetized plasma. Numerical simulations using an extended Hasegawa-Wakatani model confirm these findings, advancing plasma physics understanding.
Area of Science:
- Plasma Physics
- Fluid Dynamics
- Nonlinear Dynamics
Background:
- Drift wave turbulence is a key phenomenon in magnetized plasmas, influencing energy and particle transport.
- Understanding and controlling turbulence is crucial for magnetic confinement fusion energy research.
- Spatiotemporal synchronization offers a potential mechanism for turbulence management.
Purpose of the Study:
- To experimentally investigate spatiotemporal open-loop synchronization of drift wave turbulence.
- To model the synchronization effect using a rotating current profile.
- To validate numerical simulations against experimental observations.
Main Methods:
- Experiments were conducted on spatiotemporal open-loop synchronization in a magnetized cylindrical plasma.
- A rotating current profile with a specific mode structure was used to model the synchronization.
- An extended Hasegawa-Wakatani model was employed for numerical simulations.
Main Results:
- Experimental results demonstrated the occurrence of spatiotemporal open-loop synchronization.
- The rotating current profile effectively modeled the synchronization phenomenon.
- Numerical simulations showed good agreement with the experimental findings.
Conclusions:
- The study confirms that spatiotemporal open-loop synchronization of drift wave turbulence is achievable in magnetized plasmas.
- The employed modeling approach using rotating current profiles is validated by experimental data.
- This research contributes to the fundamental understanding of turbulence control in plasma systems.