scholarly journals Effect of the gas blanket on the stability of the dense z-pinch

1979 ◽  
Author(s):  
B.R. Suydam
Keyword(s):  
The Stability ◽  
Z Pinch

A study of the stability of the Z pinch under fusion conditions using the Hall fluid model

1984 ◽  
Vol 27 (12) ◽  
pp. 2886 ◽  
Author(s):  
M. Coppins ◽  
D. J. Bond ◽  
M. G. Haines
Keyword(s):  
Fluid Model ◽  
The Stability ◽  
Z Pinch

On The Stability Of The Magnetized Noh Z-Pinch Problem*

2017 ◽  
Author(s):  
S.T. Zalesak ◽  
A.L. Velikovich ◽  
J.L. Giuliani ◽  
Andrey Beresnyak
Keyword(s):  
The Stability ◽  
Z Pinch

scholarly journals The stability of the high-density z-pinch

1989 ◽  
Author(s):  
A. H. Glasser ◽  
R. A. Nebel
Keyword(s):  
High Density ◽  
The Stability ◽  
Z Pinch

Stability of short-axial-wavelength internal kink modes of an anisotropic plasma

1987 ◽  
Vol 38 (3) ◽  
pp. 495-499 ◽  
Author(s):  
M. Faghihi ◽  
J. Scheffel
Keyword(s):  
Current Density ◽  
Anisotropic Plasma ◽  
Constant Current ◽  
Constant Current Density ◽  
The Stability ◽  
Z Pinch

The double adiabatic equations are used to study the stability of a cylindrical Z-pinch with respect to small axial wavelength, internal kink (m ≥ 1) modes. It is found that marginally (ideally) unstable, isotropic equilibria are stabilized. Also, constant-current-density equilibria can be stabilized for P⊥ > P∥ and large β⊥

Stabilizing and destabilizing influence of the Hall effect in a Z pinch with a step-like volume current profile

1983 ◽  
Vol 30 (1) ◽  
pp. 169-178 ◽  
Author(s):  
Ulrich Schaper
Keyword(s):  
Dispersion Relation ◽  
Stable Range ◽  
Current Profile ◽  
Stability Boundaries ◽  
The Stability ◽  
Volume Currents ◽  
Volume Current ◽  
Stability Limits ◽  
Z Pinch ◽  
Current Reversal

A dispersion relation is derived for axisymmetric perturbations of an infinitely extended circular incompressible Z pinch with a step-like volume current profile. This profile is characterized by constant but different volume currents in different regions of the plasma and at the step surface there is a sheet current. The stability boundaries are shifted compared with stability limits in ideal MHD theory. For equilibria with no current reversal there is a new stable range whereas for equilibria with current reversal there is a new unstable range. The number of solutions of the dispersion relation depends on the equilibrium. The behaviour of the eigenvalues near the stability boundaries is treated in accordance with bifurcation theory.

scholarly journals The effect of axial flow on the stability in the Z-pinch

2006 ◽  
Vol 55 (5) ◽  
pp. 2333
Author(s):  
Zhang Yang ◽  
Ding Ning
Keyword(s):  
Axial Flow ◽  
The Stability ◽  
Z Pinch

Study of the stability of Z-pinch implosions with different initial density profiles

2014 ◽  
Vol 21 (5) ◽  
pp. 052701 ◽  
Author(s):  
A. G. Rousskikh ◽  
A. S. Zhigalin ◽  
V. I. Oreshkin ◽  
N. A. Labetskaya ◽  
S. A. Chaikovsky ◽  
...  
Keyword(s):  
Initial Density ◽  
Density Profiles ◽  
The Stability ◽  
Z Pinch

scholarly journals Electrostatic stability of electron–positron plasmas in dipole geometry

2018 ◽  
Vol 84 (2) ◽  
Author(s):  
Alexey Mishchenko ◽  
Gabriel G. Plunk ◽  
Per Helander
Keyword(s):  
Debye Length ◽  
Stability Diagram ◽  
Landau Damping ◽  
Point Dipole ◽  
Stability Boundaries ◽  
Singular Behaviour ◽  
Electron Positron ◽  
The Stability ◽  
Electrostatic Stability ◽  
Z Pinch

The electrostatic stability of electron–positron plasmas is investigated in the point-dipole and Z-pinch limits of dipole geometry. The kinetic dispersion relation for sub-bounce-frequency instabilities is derived and solved. For the zero-Debye-length case, the stability diagram is found to exhibit singular behaviour. However, when the Debye length is non-zero, a fluid mode appears, which resolves the observed singularity, and also demonstrates that both the temperature and density gradients can drive instability. It is concluded that a finite Debye length is necessary to determine the stability boundaries in parameter space. Landau damping is investigated at scales sufficiently smaller than the Debye length, where instability is absent.

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

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