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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.
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 StyleD. 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 StyleD. 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.
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 StyleG. 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 StyleG. 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.
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 StyleD. 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 StyleD. 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.
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.
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 StyleD. 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 StyleD. 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.
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.
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 StyleG. 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 StyleG. 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.
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.
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 StyleG. 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 StyleG. 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.
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.
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 StyleD. 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 StyleD. 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.