scholarly journals ON THE STABILITY OF A COMPRESSIBLE PLASMA COLUMN

1964 ◽  
Vol 20 (8) ◽  
pp. 785
Author(s):  
SHI BING-REN
Keyword(s):  
Plasma Column ◽  
Compressible Plasma ◽  
The Stability

scholarly journals Spectrum and stability of a rigidly rotating compressible plasma

1997 ◽  
Vol 58 (1) ◽  
pp. 101-121 ◽  
Author(s):  
R. J. NIJBOER ◽  
A. E. LIFSCHITZ ◽  
J. P. GOEDBLOED
Keyword(s):  
Magnetic Field ◽  
Continuous Spectrum ◽  
Density Profile ◽  
Plasma Column ◽  
Poloidal Magnetic Field ◽  
Compressible Plasma

We consider the spectrum and stability of a compressible, rigidly rotating plasma column with constant magnetic pitch. It is found that when the pressure on axis is zero, a continuous spectrum arises, which may become unstable. When the pressure on axis is finite or a conducting core is included, the spectrum is discrete, but may still be unstable. The instability is due to the poloidal magnetic field and/or the rotation of the cylinder in combination with the density profile. It is found numerically that the pressure stabilizes both types of instabilities.

Radiation from a ring source around a compressible plasma column

1970 ◽  
Vol 22 (1) ◽  
pp. 259-272
Author(s):  
D. K. Cheng ◽  
H. C. Chen
Keyword(s):  
Plasma Column ◽  
Compressible Plasma ◽  
Ring Source

Does neutral dynamics suppress instabilities in partially ionized plasma?

2002 ◽  
Vol 68 (3) ◽  
pp. 173-190 ◽  
Author(s):  
A. A. SHAIKH ◽  
A. C. DAS
Keyword(s):  
Magnetic Field ◽  
Stability Analysis ◽  
Plasma Column ◽  
Sustainable Growth ◽  
Deep Coma ◽  
Equilibrium Pressure ◽  
Neutral Drift ◽  
Critical Wavelength ◽  
Partially Ionized ◽  
The Stability

We present two findings: (i) in the absence of compressibility of (cold) neutrals, the instability triggered by neutral drift due to gradients in plasma density and magnetic field and (ii) the equilibrium pressure-gradient- (PG-) driven instabilities with and without neutral dynamics. The results of detailed analysis suggest that on account of neutral dynamics the growth of these instabilities is suppressed by a neutral perturbational effect. Suppression of PG-driven instabilities is highlighted and the critical wavelength for sustainable growth is found. The physics involved in the mechanism of instabilities is discussed. The endeavour in these investigations is justifiable in its usefulness for understanding the phenomena pertinent to partially ionized plasma (PIP). The stability analysis presented here may be useful for understanding the plasma processes in ‘deep’ coma (very near to the nucleus of coma), at the edges of a plasma column, near a divertor region and in the case of sublimating gas from a cloud.

On the influence of a radial electric field on the stability of a magnetically confined plasma

1969 ◽  
Vol 3 (4) ◽  
pp. 559-565
Author(s):  
A. Nocentini
Keyword(s):  
Electric Field ◽  
Plasma Column ◽  
Recent Experiment ◽  
Radial Electric Field ◽  
Unstable Wave ◽  
Magnetically Confined ◽  
Neutral Plasma ◽  
The Stability

A magnetically confiuied, slightly non-uniform and non-neutral plasma column is considered. The existence is shown, in plane, infinite geometry, of a mode whose characteristic properties agree with those of an unstable wave detected in a recent experiment.

INTERACTION OF EM WAVES WITH A COMPRESSIBLE PLASMA COLUMN

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-597-C7-598
Author(s):  
Lj. R. Cander ◽  
B. V. Stanić
Keyword(s):  
Plasma Column ◽  
Compressible Plasma

HELMHOLTZ INSTABILITY OF A VISCOUS COMPRESSIBLE PLASMA

1965 ◽  
Vol 43 (10) ◽  
pp. 1891-1903
Author(s):  
O. P. Bhutani ◽  
A. K. Sundaram
Keyword(s):  
Uniform Magnetic Field ◽  
Plane Boundary ◽  
Electrical Conductor ◽  
Helmholtz Instability ◽  
Compressible Plasma ◽  
Viscosity Parameter ◽  
Perfect Electrical Conductor ◽  
The Stability ◽  
Exchange Of Stability ◽  
Mode Technique

An attempt has been made to discuss the Helmholtz instability of a viscous compressible plasma considered to be a perfect electrical conductor. Initially, the plasma is assumed to be in contact with a uniform magnetic field along a plane boundary that is parallel to the field and is assumed to flow with uniform velocity V0 perpendicular to the field. By using the normal mode technique, the amplitudes of the perturbed quantities are obtained. The conditions for the validity of the principle of exchange of stability and overstability are obtained also. Finally, the growth-rate curves for different values of the viscosity parameter λ′ have been drawn and it has been found that the effect of viscosity adds to the stability of the system.

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