Journal ArticleDOI
Magnetic field pitch-angle measurments in the PBX-M tokamak using the motional Stark effect.
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TLDR
Polarimetry measurements of the Doppler-shifted H{sub {alpha}} emission from a neutral hydrogen beam on the PBX-M tokamak have been employed in a novel technique for obtaining {ital q}({ital r}) and magnetic field pitch-angle profiles using the Stark effect.Abstract:
Polarimetry measurements of the Doppler-shifted H{sub {alpha}} emission from a neutral hydrogen beam on the PBX-M tokamak have been employed in a novel technique for obtaining {ital q}({ital r}) and magnetic field pitch-angle profiles using the Stark effect. The resulting {ital q}({ital r}) profile is very broad and its central value, {ital q}(0), is significantly below 1, which has important implications for theoretical models of sawteeth.read more
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Journal ArticleDOI
Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices
TL;DR: The ExB shear stabilization model was originally developed to explain the transport barrier formed at the plasma edge in tokamaks after the L (low) to H (high) transition as mentioned in this paper.
Journal ArticleDOI
Internal transport barriers in tokamak plasmas
TL;DR: In this article, internal transport barriers in tokamak plasmas are explored in order to improve confinement and stability beyond the reference scenario, used for the ITER extrapolation, and to achieve higher bootstrap current fractions as an essential part of non-inductive current drive.
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An overview of charge-exchange spectroscopy as a plasma diagnostic
TL;DR: In this article, the atomic physics considerations for interpreting the data, including the influence of the plasma environment, are reviewed, and examples of recent applications to fusion studies are presented, as well as a review of the application of charge exchange spectroscopy in fusion plasmas.
Journal ArticleDOI
MHD Equilibrium Reconstruction in the DIII-D Tokamak
L. L. Lao,H.E. St. John,Q. Peng,J.R. Ferron,E. J. Strait,T. S. Taylor,W. H. Meyer,Chuanguo Zhang,K. I. You +8 more
TL;DR: In this paper, the development of axisymmetric magnetohydrodynamic equilibrium reconstruction to support plasma operation and data analysis in the DIII-D tokamak is discussed.
Journal ArticleDOI
A review of Alfvén eigenmode observations in toroidal plasmas
TL;DR: In toroidal magnetically confined plasmas, eigenmodes of Alfven waves can be destablized by energetic ions with velocities comparable to the Alfven velocity as discussed by the authors.
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