Erratum: Radial structure of electron drift waves and anomalous transport in the edge plasma

1999 ◽  
Vol 77 (5) ◽  
pp. 409-409
Author(s):  
J LV Lewandowski
Keyword(s):  
Anomalous Transport ◽  
Edge Plasma ◽  
Drift Waves ◽  
Electron Drift ◽  
Radial Structure

Radial structure of electron drift waves and anomalous transport in the edge plasma

1999 ◽  
Vol 77 (2) ◽  
pp. 113-126
Author(s):  
J LV Lewandowski
Keyword(s):  
Edge Plasma ◽  
Tokamak Plasma ◽  
Medium Size ◽  
Drift Waves ◽  
Electron Drift ◽  
Plasma Parameters ◽  
Mode Amplitude ◽  
Radial Structure ◽  
Density Scale ◽  
Toroidal Geometry

The radial structure of electron drift waves in a low-pressure tokamak plasma is presented. The ions are cold and an electrostatic approximation for the fluctuating potential is used. It is shown that the problem of the radial structure of drift waves in toroidal geometry is amenable to a two-step solution; in first approximation, the radial structure of the mode is neglected and the problem to be solved is the usual eigenmode equation along the (extended) poloidal angle; in second approximation, the mode amplitude is expanded in ascending powers of the parameter (k⊥Ln)-1/2 , where k⊥ is the magnitude of the lowest-order wavevector and Ln is the radial density scale length. It is shown that the radial structure of drift-type modes can depend strongly on the magnetic shear and the scalar magnetic curvature. Numerical calculations for plasma parameters relevant to the edge region of medium-size tokamaks are presented. PACS Nos.: 52.35Kt, 52.30Jb, and 52.35Ra

scholarly journals Radial Structure of Electron Drift Waves in Tokamak Geometry

1999 ◽  
Vol 52 (1) ◽  
pp. 59
Author(s):  
J. L. V. Lewandowski
Keyword(s):  
Low Pressure ◽  
Tokamak Plasma ◽  
Drift Waves ◽  
Electron Drift ◽  
Radial Density ◽  
Mode Amplitude ◽  
First Approximation ◽  
Field Diffusion ◽  
Radial Structure ◽  
Toroidal Geometry

The radial structure of electron drift waves in a low-pressure tokamak plasma is presented. The ions are cold and an electrostatic approximation for the fluctuating potential is used. It is shown that problem of the radial structure of drift waves in toroidal geometry is amenable to a two-step solution; in the first approximation, the radial structure of the mode is neglected and the problem to be solved is the usual eigenmode equation along the (extended) poloidal angle; in the second approximation, the mode amplitude is expanded in ascending powers of the parameter (k⊥Ln)–1/2, where k⊥ is the magnitude of the lowest-order wavevector and Ln is the radial density scalelength. The implications of these radially-extended drift-type modes for the anomalous cross-field diffusion are discussed.

Collisionless drift waves in the H mode edge (plasma)

1994 ◽  
Vol 34 (1) ◽  
pp. 87-91 ◽  
Author(s):  
S Sen ◽  
M.G Rusbridge ◽  
R.J Hastie
Keyword(s):  
Edge Plasma ◽  
Drift Waves

Electron drift waves in an advanced tokamak plasma

2006 ◽  
Vol 73 (6) ◽  
pp. 648-654
Author(s):  
M A Mahmood ◽  
T Rafiq ◽  
M Persson
Keyword(s):  
Tokamak Plasma ◽  
Drift Waves ◽  
Electron Drift

Comment on "Guided and Surface Electron Drift Waves in Plasmas"

1988 ◽  
Vol 61 (15) ◽  
pp. 1791-1791 ◽  
Author(s):  
L. Stenflo ◽  
M. Y. Yu ◽  
P. K. Shukla
Keyword(s):  
Drift Waves ◽  
Electron Drift ◽  
Surface Electron

scholarly journals Collisional drift waves in stellarator plasmas

2003 ◽  
Vol 81 (12) ◽  
pp. 1309-1330
Author(s):  
J LV Lewandowski
Keyword(s):  
Magnetic Field ◽  
Equilibrium Model ◽  
Computational Study ◽  
Local Equilibrium ◽  
Edge Plasma ◽  
Drift Waves ◽  
Field Equations ◽  
Drift Wave ◽  
The Impact ◽  
The Magnetic Field

A computational study of resistive drift waves in the edge plasma of a stellarator with an helical magnetic axis is presented. Three coupled field equations, describing the collisional drift-wave dynamics in the linear approximation, are solved as an initial-value problem along the magnetic field line. The magnetohydrodynamic equilibrium is obtained from a three-dimensional local equilibrium model. The use of a local magnetohydrodynamic equilibrium model allows for a computationally efficient systematic study of the impact of the magnetic field structure on drift-wave stability. PACS Nos.: 52.35.Kt, 52.30.Jb, 52.35.Ra

Edge plasma electrostatic fluctuation and anomalous transport characteristics in the Sino-united spherical tokamak

2004 ◽  
Vol 47 (1) ◽  
pp. 1-16 ◽  
Author(s):  
W H Wang ◽  
Y X He ◽  
Z Gao ◽  
L Zeng ◽  
G P Zhang ◽  
...  
Keyword(s):  
Anomalous Transport ◽  
Edge Plasma ◽  
Spherical Tokamak
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