Helicon waves in a cylindrical plasma column

1994 ◽  
Vol 52 (3) ◽  
pp. 465-470 ◽  
Author(s):  
M. Shoucri
Keyword(s):  
Plasma Column ◽  
Body Wave ◽  
Low Frequency ◽  
Transverse Magnetic ◽  
Current Drive ◽  
Cylindrical Plasma ◽  
Helicon Wave ◽  
Collisional Damping ◽  
Helicon Waves ◽  
Cylindrical Plasma Column

Helicon waves have been used for efficiently coupling radio-frequency power to plasmas, and are studied for their potential application for low-frequency current drive in tokamks. In this paper the electromagnetic field components and the dispersion relation for azimuthally independent helicon-wave oscillations in a cylindrical plasma column are derived. The coupling of transverse electric TE and transverse magnetic TM modes associated with these oscillations is discussed. The effect of the collisional damping on determining the nature of the TM mode (either surface wave or body wave) is analysed.

The effect of a steady azimuthal field on rotating magnetic field current drive

1987 ◽  
Vol 37 (3) ◽  
pp. 423-433 ◽  
Author(s):  
W. K. Bertram
Keyword(s):  
Magnetic Field ◽  
Plasma Column ◽  
Substantial Reduction ◽  
Current Drive ◽  
Rotating Magnetic Field ◽  
Azimuthal Magnetic Field ◽  
Low Resistivity ◽  
Cylindrical Plasma ◽  
Resistive Plasma ◽  
Cylindrical Plasma Column

The method of generating steady azimuthal currents in a cylindrical plasma column by means of a rotating magnetic field is investigated numerically and analytically for the case where an external steady azimuthal magnetic field is applied to the plasma. For a plasma of low resistivity, the effect of imposing a strong azimuthal field is a substantial reduction in the amount of current that can be driven. For a resistive plasma the effect is more complicated. In some cases the azimuthal field enhances current drive as has been observed in recent experiments.

Near-Field Pattern Images of a Cylindrical Plasma Column

2011 ◽  
Vol 39 (11) ◽  
pp. 2552-2553 ◽  
Author(s):  
Nataliya K. Sakhnenko ◽  
Nadiya P. Stogniy ◽  
Alexander G. Nerukh
Keyword(s):  
Plasma Column ◽  
Near Field ◽  
Field Pattern ◽  
Cylindrical Plasma ◽  
Cylindrical Plasma Column

Anomalous skin effect for a plasma column in a magnetic field

1973 ◽  
Vol 10 (3) ◽  
pp. 349-358 ◽  
Author(s):  
R. G. Storer ◽  
C. Meaney
Keyword(s):  
Magnetic Field ◽  
Plasma Column ◽  
Electron Density Distribution ◽  
Skin Effect ◽  
Axial Magnetic Field ◽  
Complete Solution ◽  
Low Frequency ◽  
Anomalous Skin Effect ◽  
Plasma Radius ◽  
Cylindrical Plasma Column

The influence of a steady axial magnetic field on the anomalous penetration of low frequency electromagnetic fields into a cylindrical plasma column is investigated by considering a plasma with a Gaussian electron density distribution. For this model, a complete solution is obtained for Boltzmann's equation coupled to Maxwell's equations, and the fields calculated exactly. The results show dramatic changes of the internal fields for small changes of the applied magnetic field when the average Lamour radius of the electrons is of the order of the plasma radius.

scholarly journals Effects of boundary conditions and flow on the kink instability in a cylindrical plasma column

2007 ◽  
Vol 14 (2) ◽  
pp. 022103 ◽  
Author(s):  
I. Furno ◽  
T. P. Intrator ◽  
G. Lapenta ◽  
L. Dorf ◽  
S. Abbate ◽  
...  
Keyword(s):  
Boundary Conditions ◽  
Plasma Column ◽  
Cylindrical Plasma ◽  
Kink Instability ◽  
Cylindrical Plasma Column

scholarly journals Oscillations of an inhomogeneous cylindrical plasma column

1967 ◽  
Vol 50 (1) ◽  
pp. 129-136
Author(s):  
S. Krishan ◽  
S. Singh Rao
Keyword(s):  
Plasma Column ◽  
Cylindrical Plasma ◽  
Cylindrical Plasma Column
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