Linear analysis of sheared flow stabilization of global magnetohydrodynamic instabilities based on the Hall fluid model

2002 ◽  
Vol 9 (3) ◽  
pp. 913-922 ◽  
Author(s):  
V. I. Sotnikov ◽  
I. Paraschiv ◽  
V. Makhin ◽  
B. S. Bauer ◽  
J. N. Leboeuf ◽  
...  
Keyword(s):  
Fluid Model ◽  
Linear Analysis ◽  
Sheared Flow ◽  
Flow Stabilization ◽  
Sheared Flow Stabilization

scholarly journals Kinetic simulations of sheared flow stabilization in high-temperature Z-pinch plasmas

2019 ◽  
Vol 26 (6) ◽  
pp. 062506 ◽  
Author(s):  
K. Tummel ◽  
D. P. Higginson ◽  
A. J. Link ◽  
A. E. W. Schmidt ◽  
D. T. Offermann ◽  
...  
Keyword(s):  
High Temperature ◽  
Sheared Flow ◽  
Flow Stabilization ◽  
Sheared Flow Stabilization ◽  
Z Pinch

scholarly journals Increasing plasma parameters using sheared flow stabilization of a Z-pinch

2017 ◽  
Vol 24 (5) ◽  
pp. 055702 ◽  
Author(s):  
U. Shumlak ◽  
B. A. Nelson ◽  
E. L. Claveau ◽  
E. G. Forbes ◽  
R. P. Golingo ◽  
...  
Keyword(s):  
Plasma Parameters ◽  
Sheared Flow ◽  
Flow Stabilization ◽  
Sheared Flow Stabilization ◽  
Z Pinch

Sheared Flow Stabilization of them=1Kink Mode inZPinches

1995 ◽  
Vol 75 (18) ◽  
pp. 3285-3288 ◽  
Author(s):  
U. Shumlak ◽  
C. W. Hartman
Keyword(s):  
Sheared Flow ◽  
Flow Stabilization ◽  
Sheared Flow Stabilization

Sheared flow stabilization experiments in the ZaP flow Z pinch

2003 ◽  
Vol 10 (5) ◽  
pp. 1683-1690 ◽  
Author(s):  
U. Shumlak ◽  
B. A. Nelson ◽  
R. P. Golingo ◽  
S. L. Jackson ◽  
E. A. Crawford ◽  
...  
Keyword(s):  
Sheared Flow ◽  
Flow Stabilization ◽  
Sheared Flow Stabilization ◽  
Z Pinch

Linear Analysis of the Interaction of Rotating Helical Magnetic Perturbations with Tokamak Plasmas Based on the Reduced Two-Fluid Model

2006 ◽  
Vol 46 (7-9) ◽  
pp. 539-544 ◽  
Author(s):  
Y. Kikuchi ◽  
K. H. Finken ◽  
M. Jakubowski ◽  
M. Lehnen ◽  
D. Reiser ◽  
...  
Keyword(s):  
Fluid Model ◽  
Linear Analysis ◽  
Tokamak Plasmas ◽  
Magnetic Perturbations ◽  
Two Fluid Model ◽  
Two Fluid

scholarly journals Two-fluid tokamak equilibria with reversed magnetic shear and sheared flow

2007 ◽  
Vol 73 (3) ◽  
pp. 347-366 ◽  
Author(s):  
G. POULIPOULIS ◽  
G. N. THROUMOULOPOULOS ◽  
H. TASSO
Keyword(s):  
Pressure Gradient ◽  
Electric Fields ◽  
Fluid Model ◽  
Radial Electric Field ◽  
Plasma Phys ◽  
Magnetic Shear ◽  
Sheared Flow ◽  
Order Of Magnitude ◽  
The Impact ◽  
Two Fluid

AbstractThe aim of the present work is to investigate tokamak equilibria with reversed magnetic shear and sheared flow, which may play a role in the formation of internal transport barriers (ITBs), within the framework of the two-fluid model in cylindrical geometry. The study is based on exact self-consistent solutions by means of which the impact of the magnetic shear, s, and the ‘toroidal’ (axial) and ‘poloidal’ (azimuthal) ion velocity components, viz and viθ, on the radial electric field, Er, its shear, |dEr/dr|, and the shear of the E×B velocity, ωE×B≡|d/dr(E× B/B2)|, is examined. For a wide parametric regime of experimental concern it turns out that the contributions of the viz, viθ and pressure gradient (∇ Pi) terms to Er, |Er′| and ωE×B are of the same order of magnitude. The contribution of the ∇ Pi term is missing in the framework of magnetohydrodynamics (MHD) (G. Poulipoulis et al. 2004 Plasma Phys. Control. Fusion46, 639). The impact of s on ωE×B through the ∇ Pi term is stronger than that through the velocity terms; in particular for constant Bz the ion pressure gradient contribution to ωE×B at the point where dEr/dr=0 scales as (1−s)(2−s), whereas the ion flow contributions to ωE×B scale as (1−s). The results indicate that, like MHD, the magnetic shear and the sheared toroidal and poloidal velocities act synergetically in producing electric fields and therefore ωE×B profiles compatible with the ones observed in discharges with ITBs; owing to the ∇ Pi term, however, the impact of s on Er, |Er′| and ωE×B is stronger than that in MHD.

Sign in / Sign up

Export Citation Format

Share Document