Nonlinear Coupling Of Tearing Fluctuations In The Madison Symmetric Torus
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Nonlinear Coupling Of Tearing Fluctuations In The Madison Symmetric Torus
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Author :
language : en
Publisher:
Release Date : 1992
Nonlinear Coupling Of Tearing Fluctuations In The Madison Symmetric Torus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Three-wave, nonlinear, tearing mode coupling has been measured in the Madison Symmetric Torus (MST) reversed-field pinch (RFP) [Fusion Technol. 19, 131 (1991)] using bispectral analysis of edge magnetic fluctuations resolved in k-space. The strength of nonlinear three-wave interactions satisfying the sum rules m[sub 1] + m[sub 2] = m[sub 3] and n[sub 1] + n[sub 2] = n[sub 3] is measured by the bicoherency. In the RFP, m=l, n[approximately]2R/a (6 for MST) internally resonant modes are linearly unstable and grow to large amplitude. Large values of bicoherency occur for two m=l modes coupled to an m=2 mode and the coupling of intermediate toroidal modes, e.g., n=6 and 7 coupled to n=13. These experimental bispectral features agree with predicted bispectral features derived from MHD computation. However, in the experiment, enhanced coupling occurs in the crash'' phase of a sawtooth oscillation concomitant with a broadened mode spectrum suggesting the onset of a nonlinear cascade.
Measurement Of Magnetic Turbulence Structure And Nonlinear Mode Coupling Of Tearing Fluctuations In The Madison Symmetric Torus Reversed Field Pinch Edge
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Author : Saeed Assadi
language : en
Publisher:
Release Date : 1994
Measurement Of Magnetic Turbulence Structure And Nonlinear Mode Coupling Of Tearing Fluctuations In The Madison Symmetric Torus Reversed Field Pinch Edge written by Saeed Assadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Measurement Of Magnetic Turbulence Structure And Nonlinear Mode Coupling Of Tearing Fluctuations In The Madison Symmetric Torus Reversed Field Pinch Edge
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Author :
language : en
Publisher:
Release Date : 1994
Measurement Of Magnetic Turbulence Structure And Nonlinear Mode Coupling Of Tearing Fluctuations In The Madison Symmetric Torus Reversed Field Pinch Edge written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Linear and nonlinear magnetohydrodynamic (MHD) stability of current-driven modes are studied in the MST reversed field pinch. Measured low frequency (f
Edge Fluctuations In The Mst Madison Symmetric Torus Reversed Field Pinch
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Author :
language : en
Publisher:
Release Date : 1990
Edge Fluctuations In The Mst Madison Symmetric Torus Reversed Field Pinch written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Edge magnetic and electrostatic fluctuations are measured in the Madison Symmetric Torus (MST) reversed field pinch. At low frequency (25 kHz), the mode number spectra of magnetic fluctuations agree very well with theoretical prediction for nonlinearly saturated tearing fluctuations resonant in the core. At high frequency (50 kHz to 100 kHz) the magnetic spectra broaden and the modes become resonant in the reversal region. Nonlinear phenomena are under experimental investigation. The low frequency fluctuations phase-lock together to produce a rotating localized disturbance. Bi-spectral analysis in frequency also reveals nonlinear three-wave mode-coupling at low frequency. Electrostatic fluctuations are substantial and do not appear to obey a Boltzmann relation (i.e. e{tilde {phi}}/kT{sub e} {tilde p}{sub e}/p{sub e} where {tilde {phi}} and {tilde p}{sub e} are the fluctuating potential and pressure, respectively). From measurements of the fluctuating density, temperature, and potential we infer that the electrostatic fluctuation induced transport of particles and energy can be substantial. 13 refs., 11 figs.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1995
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Power resources categories.
Origin Of Tearing Mode Excitation In The Mst Reversed Field Pinch
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Author : Seung-Ho Choi
language : en
Publisher:
Release Date : 2006
Origin Of Tearing Mode Excitation In The Mst Reversed Field Pinch written by Seung-Ho Choi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Magnetic Reconnection In Mst Reversed Field Pinch
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Author : Neal Acker Crocker
language : en
Publisher:
Release Date : 2001
Magnetic Reconnection In Mst Reversed Field Pinch written by Neal Acker Crocker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Numerical Simulations Of Dynamo Suppression During Poloidal Current Drive In The Reversed Field Pinch
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Author : James Michael Reynolds
language : en
Publisher:
Release Date : 2007
Numerical Simulations Of Dynamo Suppression During Poloidal Current Drive In The Reversed Field Pinch written by James Michael Reynolds and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Fast Electron Generation And Transport In A Turbulent Magnetized Plasma
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Author : Matthew Randall Stoneking
language : en
Publisher:
Release Date : 1994
Fast Electron Generation And Transport In A Turbulent Magnetized Plasma written by Matthew Randall Stoneking and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.