skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Long-range correlations induced by the self-regulation of zonal flows and drift-wave turbulence

Abstract

By means of a unique probe array, the interaction between zonal flows and broad-band drift-wave turbulence has been investigated experimentally in a magnetized toroidal plasma. Homogeneous potential fluctuations on a magnetic flux surface, previously reported as long range correlations, could be traced back to a predator-prey-like interaction between the turbulence and the zonal flow. At higher frequency the nonlocal transfer of energy to the zonal flow is dominant and the low-frequency oscillations are shown to result from the reduced turbulence activity due to this energy loss. This self-regulation process turns out to be enhanced with increased background shear flows.

Authors:
 [1]; ;  [2]
  1. Center for Energy Research, University of California at San Diego, San Diego, California 92093 (United States)
  2. Institut fuer Plasmaforschung, Universitaet Stuttgart, D-70569 Stuttgart (Germany)
Publication Date:
OSTI Identifier:
21502856
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)
Additional Journal Information:
Journal Volume: 82; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevE.82.056403; (c) 2010 The American Physical Society; Journal ID: ISSN 1539-3755
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CORRELATIONS; ENERGY LOSSES; FLUCTUATIONS; MAGNETIC FLUX; OSCILLATIONS; PLASMA; POTENTIALS; TURBULENCE; WAVE PROPAGATION; LOSSES; VARIATIONS

Citation Formats

Manz, P, Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093, Ramisch, M, and Stroth, U. Long-range correlations induced by the self-regulation of zonal flows and drift-wave turbulence. United States: N. p., 2010. Web. doi:10.1103/PHYSREVE.82.056403.
Manz, P, Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093, Ramisch, M, & Stroth, U. Long-range correlations induced by the self-regulation of zonal flows and drift-wave turbulence. United States. https://doi.org/10.1103/PHYSREVE.82.056403
Manz, P, Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093, Ramisch, M, and Stroth, U. 2010. "Long-range correlations induced by the self-regulation of zonal flows and drift-wave turbulence". United States. https://doi.org/10.1103/PHYSREVE.82.056403.
@article{osti_21502856,
title = {Long-range correlations induced by the self-regulation of zonal flows and drift-wave turbulence},
author = {Manz, P and Center for Momentum Transport and Flow Organization, University of California at San Diego, San Diego, California 92093 and Ramisch, M and Stroth, U},
abstractNote = {By means of a unique probe array, the interaction between zonal flows and broad-band drift-wave turbulence has been investigated experimentally in a magnetized toroidal plasma. Homogeneous potential fluctuations on a magnetic flux surface, previously reported as long range correlations, could be traced back to a predator-prey-like interaction between the turbulence and the zonal flow. At higher frequency the nonlocal transfer of energy to the zonal flow is dominant and the low-frequency oscillations are shown to result from the reduced turbulence activity due to this energy loss. This self-regulation process turns out to be enhanced with increased background shear flows.},
doi = {10.1103/PHYSREVE.82.056403},
url = {https://www.osti.gov/biblio/21502856}, journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)},
issn = {1539-3755},
number = 5,
volume = 82,
place = {United States},
year = {Mon Nov 15 00:00:00 EST 2010},
month = {Mon Nov 15 00:00:00 EST 2010}
}