Author: Franklin Douglas WitherspoonPublisher:
ISBN:
Category : Magnetohydrodynamic waves
Languages : en
Pages : 374
Book Description
Experimental Study of the Shear Alfven Resonance in a Tokamak
Author: Franklin Douglas WitherspoonPublisher:
ISBN:
Category : Magnetohydrodynamic waves
Languages : en
Pages : 374
Book Description
Experimental Observation of the Shear Alfv́en Resonance in a Tokamak
Author: F. D. WitherspoonExperimental investigation of driven Alfvén wave resonances on the PRETEXT tokamak
Author: William David BoothPublisher:
ISBN:
Category : Magnetohydrodynamic waves
Languages : en
Pages : 208
Book Description
Energy Research Abstracts
Author: Shear Alfven Resonances in Tokapole II.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
It has been suggested that efficient heating can occur by coupling energy through the shear Alfven resonance that is predicted to occur at particular locations within inhomogeneous plasmas. This heating mechanism should be applicable to tokamaks; however, the existence of the resonances in tokamaks has not yet been established experimentally. We present here direct observations of localized enhancement in the driven wave magnetic field which are compatible with theoretical predictions for the shear Alfven resonance in tokamak geometry. These resonance studies at low absorbed power will be followed by higher power heating (approx. 1 MW) presently being developed.
ERDA Energy Research Abstracts
Author: Fusion Energy Update
Author: Alfven Wave Studies on a Tokamak
Author: David KortbawiExperimental Investigation of Low Frequency Current Drive on the Phaedrus-T Tokamak
Author: Stephen J. WukitchExperimental Study of Reversed Shear Alfven Eigenmodes During The Current Ramp In The Alcator C-Mod Tokamak
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Experiments conducted in the Alcator C-Mod tokamak at MIT have explored the physics of reversed shear Alfven eigenmodes (RSAEs) during the current ramp. The frequency evolution of the RSAEs throughout the current ramp provides a constraint on the evolution of qmin, a result which is important in transport modeling and for comparison with other diagnostics which directly measure the magnetic field line structure. Additionally, a scaling of the RSAE minimum frequency with the sound speed is used to derive a measure of the adiabatic index, a measure of the plasma compressibility. This scaling bounds the adiabatic index at 1.40 ± 0:15 used in MHD models and supports the kinetic calculation of separate electron and ion compressibilities with an ion adiabatic index close to 7~4.