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Dr. Dereth Drake
Department of Physics, Astronomy, and Geosciences, Valdosta State University, Valdosta, GA, USA

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Published: 01 February 2016 in Physics of Plasmas
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Plasma turbulence has been shown to play a critical role in many astrophysical and space environments. In the solar corona and solar wind, this turbulence involves the nonlinear interaction of kinetic Alfvén waves. In the Earth's magnetosphere, the turbulence is dominated by inertial Alfvén wave collisions. Observations of these wave–wave interactions in space and in laboratory plasma environments have shown that, in addition to the nonlinear cascade of energy to small scales, the interaction also produces nonlinear beat waves that have a frequency defined by f3±=|f1±f2|. Although the temporal behavior of the beat wave has been well documented, this paper presents the first detailed analysis of the spatial structure of the nonlinearly generated beat wave.

ACS Style

D. J. Drake; Gregory Howes; J. D. Rhudy; S. K. Terry; T. A. Carter; C. A. Kletzing; J. W. R. Schroeder; F. Skiff. Measurements of the nonlinear beat wave produced by the interaction of counterpropagating Alfvén waves. Physics of Plasmas 2016, 23, 022305 .

AMA Style

D. J. Drake, Gregory Howes, J. D. Rhudy, S. K. Terry, T. A. Carter, C. A. Kletzing, J. W. R. Schroeder, F. Skiff. Measurements of the nonlinear beat wave produced by the interaction of counterpropagating Alfvén waves. Physics of Plasmas. 2016; 23 (2):022305.

Chicago/Turabian Style

D. J. Drake; Gregory Howes; J. D. Rhudy; S. K. Terry; T. A. Carter; C. A. Kletzing; J. W. R. Schroeder; F. Skiff. 2016. "Measurements of the nonlinear beat wave produced by the interaction of counterpropagating Alfvén waves." Physics of Plasmas 23, no. 2: 022305.

Journal article
Published: 01 July 2013 in Physics of Plasmas
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ACS Style

G. G. Howes; K. D. Nielson; D. J. Drake; J. W. R. Schroeder; F. Skiff; C. A. Kletzing; T. A. Carter. Alfvén wave collisions, the fundamental building block of plasma turbulence. III. Theory for experimental design. Physics of Plasmas 2013, 20, 72304 .

AMA Style

G. G. Howes, K. D. Nielson, D. J. Drake, J. W. R. Schroeder, F. Skiff, C. A. Kletzing, T. A. Carter. Alfvén wave collisions, the fundamental building block of plasma turbulence. III. Theory for experimental design. Physics of Plasmas. 2013; 20 (7):72304.

Chicago/Turabian Style

G. G. Howes; K. D. Nielson; D. J. Drake; J. W. R. Schroeder; F. Skiff; C. A. Kletzing; T. A. Carter. 2013. "Alfvén wave collisions, the fundamental building block of plasma turbulence. III. Theory for experimental design." Physics of Plasmas 20, no. 7: 72304.

Journal article
Published: 01 July 2013 in Physics of Plasmas
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ACS Style

D. J. Drake; J. W. R. Schroeder; G. G. Howes; C. A. Kletzing; F. Skiff; T. A. Carter; D. W. Auerbach. Alfvén wave collisions, the fundamental building block of plasma turbulence. IV. Laboratory experiment. Physics of Plasmas 2013, 20, 72901 .

AMA Style

D. J. Drake, J. W. R. Schroeder, G. G. Howes, C. A. Kletzing, F. Skiff, T. A. Carter, D. W. Auerbach. Alfvén wave collisions, the fundamental building block of plasma turbulence. IV. Laboratory experiment. Physics of Plasmas. 2013; 20 (7):72901.

Chicago/Turabian Style

D. J. Drake; J. W. R. Schroeder; G. G. Howes; C. A. Kletzing; F. Skiff; T. A. Carter; D. W. Auerbach. 2013. "Alfvén wave collisions, the fundamental building block of plasma turbulence. IV. Laboratory experiment." Physics of Plasmas 20, no. 7: 72901.

Preprint
Published: 05 June 2013
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Turbulence is a phenomenon found throughout space and astrophysical plasmas. It plays an important role in solar coronal heating, acceleration of the solar wind, and heating of the interstellar medium. Turbulence in these regimes is dominated by Alfven waves. Most turbulence theories have been established using ideal plasma models, such as incompressible MHD. However, there has been no experimental evidence to support the use of such models for weakly to moderately collisional plasmas which are relevant to various space and astrophysical plasma environments. We present the first experiment to measure the nonlinear interaction between two counterpropagating Alfven waves, which is the building block for astrophysical turbulence theories. We present here four distinct tests that demonstrate conclusively that we have indeed measured the daughter Alfven wave generated nonlinearly by a collision between counterpropagating Alfven waves.

ACS Style

D. J. Drake; J. W. R. Schroeder; G. G. Howes; C. A. Kletzing; F. Skiff; T. A. Carter; D. W. Auerbach. Alfven Wave Collisions, The Fundamental Building Block of Plasma Turbulence IV: Laboratory Experiment. 2013, 1 .

AMA Style

D. J. Drake, J. W. R. Schroeder, G. G. Howes, C. A. Kletzing, F. Skiff, T. A. Carter, D. W. Auerbach. Alfven Wave Collisions, The Fundamental Building Block of Plasma Turbulence IV: Laboratory Experiment. . 2013; ():1.

Chicago/Turabian Style

D. J. Drake; J. W. R. Schroeder; G. G. Howes; C. A. Kletzing; F. Skiff; T. A. Carter; D. W. Auerbach. 2013. "Alfven Wave Collisions, The Fundamental Building Block of Plasma Turbulence IV: Laboratory Experiment." , no. : 1.

Article
Published: 17 December 2012 in Physical Review Letters
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Turbulence is a ubiquitous phenomenon in space and astrophysical plasmas, driving a cascade of energy from large to small scales and strongly influencing the plasma heating resulting from the dissipation of the turbulence. Modern theories of plasma turbulence are based on the fundamental concept that the turbulent cascade of energy is caused by the nonlinear interaction between counterpropagating Alfvén waves, yet this interaction has never been observationally or experimentally verified. We present here the first experimental measurement in a laboratory plasma of the nonlinear interaction between counterpropagating Alfvén waves, the fundamental building block of astrophysical plasma turbulence. This measurement establishes a firm basis for the application of theoretical ideas developed in idealized models to turbulence in realistic space and astrophysical plasma systems.

ACS Style

G. G. Howes; D. J. Drake; K. D. Nielson; T. A. Carter; C. A. Kletzing; F. Skiff. Toward Astrophysical Turbulence in the Laboratory. Physical Review Letters 2012, 109, 1 .

AMA Style

G. G. Howes, D. J. Drake, K. D. Nielson, T. A. Carter, C. A. Kletzing, F. Skiff. Toward Astrophysical Turbulence in the Laboratory. Physical Review Letters. 2012; 109 (25):1.

Chicago/Turabian Style

G. G. Howes; D. J. Drake; K. D. Nielson; T. A. Carter; C. A. Kletzing; F. Skiff. 2012. "Toward Astrophysical Turbulence in the Laboratory." Physical Review Letters 109, no. 25: 1.

Preprint
Published: 16 October 2012
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Turbulence is a ubiquitous phenomenon in space and astrophysical plasmas, driving a cascade of energy from large to small scales and strongly influencing the plasma heating resulting from the dissipation of the turbulence. Modern theories of plasma turbulence are based on the fundamental concept that the turbulent cascade of energy is caused by the nonlinear interaction between counterpropagating Alfven waves, yet this interaction has never been observationally or experimentally verified. We present here the first experimental measurement in a laboratory plasma of the nonlinear interaction between counterpropagating Alfven waves, the fundamental building block of astrophysical plasma turbulence. This measurement establishes a firm basis for the application of theoretical ideas developed in idealized models to turbulence in realistic space and astrophysical plasma systems.

ACS Style

G. G. Howes; D. J. Drake; K. D. Nielson; T. A. Carter; C. A. Kletzing; F. Skiff. Toward Astrophysical Turbulence in the Laboratory. 2012, 1 .

AMA Style

G. G. Howes, D. J. Drake, K. D. Nielson, T. A. Carter, C. A. Kletzing, F. Skiff. Toward Astrophysical Turbulence in the Laboratory. . 2012; ():1.

Chicago/Turabian Style

G. G. Howes; D. J. Drake; K. D. Nielson; T. A. Carter; C. A. Kletzing; F. Skiff. 2012. "Toward Astrophysical Turbulence in the Laboratory." , no. : 1.

Journal article
Published: 01 October 2011 in Review of Scientific Instruments
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We have designed an electric and magnetic field probe which simultaneously measure both quantities in the directions perpendicular to the background magnetic field for application to Alfvén wave experiments in the Large Plasma Device at UCLA. This new probe allows for the projection of measured wave fields onto generalized Elsässer variables. Experiments were conducted in a singly ionized He plasma at 1850 G in which propagation of Alfvén waves was observed using this new probe. We demonstrate that a clear separation of transmitted and reflected signals and determination of Poynting flux and Elsässer variables can be achieved.

ACS Style

D. J. Drake; C. A. Kletzing; F. Skiff; G. G. Howes; S. Vincena. Design and use of an Elsa?sser probe for analysis of Alfve?n wave fields according to wave direction. Review of Scientific Instruments 2011, 82, 103505 .

AMA Style

D. J. Drake, C. A. Kletzing, F. Skiff, G. G. Howes, S. Vincena. Design and use of an Elsa?sser probe for analysis of Alfve?n wave fields according to wave direction. Review of Scientific Instruments. 2011; 82 (10):103505.

Chicago/Turabian Style

D. J. Drake; C. A. Kletzing; F. Skiff; G. G. Howes; S. Vincena. 2011. "Design and use of an Elsa?sser probe for analysis of Alfve?n wave fields according to wave direction." Review of Scientific Instruments 82, no. 10: 103505.