scholarly journals Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices

1997 ◽  
Vol 4 (5) ◽  
pp. 1499-1518 ◽  
Author(s):  
K. H. Burrell
Keyword(s):  
Magnetic Confinement ◽  
Velocity Shear ◽  
Magnetic Shear

scholarly journals Stability and transport of parallel velocity shear driven mode with negative magnetic shear

2000 ◽  
Vol 7 (4) ◽  
pp. 1192-1195 ◽  
Author(s):  
S. Sen ◽  
R. A. Cairns ◽  
R. G. Storer ◽  
D. R. McCarthy
Keyword(s):  
Velocity Shear ◽  
Magnetic Shear

Reduction in transport by the parallel velocity shear instability due to reversed magnetic shear

2001 ◽  
Vol 8 (8) ◽  
pp. 3645-3651 ◽  
Author(s):  
D. R. McCarthy ◽  
E. J. Fuselier ◽  
S. Sen
Keyword(s):  
Velocity Shear ◽  
Shear Instability ◽  
Magnetic Shear

scholarly journals Effects of ExB Velocity Shear and Magnetic Shear in the Formation of Core Transport Barriers in the DIII-D Tokamak

1997 ◽  
Author(s):  
K.H. Burrell ◽  
C.M. Greenfield ◽  
L.L. Lao ◽  
G.M. Staebler ◽  
M.E. Austin ◽  
...  
Keyword(s):  
Velocity Shear ◽  
Magnetic Shear ◽  
Transport Barriers

Effects of velocity shear and magnetic shear in the formation of core transport barriers in the DIII-D tokamak

1998 ◽  
Vol 40 (9) ◽  
pp. 1585-1596 ◽  
Author(s):  
K H Burrell ◽  
M E Austin ◽  
C M Greenfield ◽  
L L Lao ◽  
B W Rice ◽  
...  
Keyword(s):  
Velocity Shear ◽  
Magnetic Shear ◽  
Transport Barriers

Activated Prominences; Mechanisms for Activation and Eruption

1979 ◽  
Vol 44 ◽  
pp. 307-313
Author(s):  
D.S. Spicer
Keyword(s):  
Pressure Gradient ◽  
Density Gradient ◽  
Current Density ◽  
Convective Instability ◽  
Tearing Mode ◽  
Magnetic Shear ◽  
Long Wavelength ◽  
Ideal Mhd ◽  
Gradient Change ◽  
Accelerated Particles

A possible relationship between the hot prominence transition sheath, increased internal turbulent and/or helical motion prior to prominence eruption and the prominence eruption (“disparition brusque”) is discussed. The associated darkening of the filament or brightening of the prominence is interpreted as a change in the prominence’s internal pressure gradient which, if of the correct sign, can lead to short wavelength turbulent convection within the prominence. Associated with such a pressure gradient change may be the alteration of the current density gradient within the prominence. Such a change in the current density gradient may also be due to the relative motion of the neighbouring plages thereby increasing the magnetic shear within the prominence, i.e., steepening the current density gradient. Depending on the magnitude of the current density gradient, i.e., magnetic shear, disruption of the prominence can occur by either a long wavelength ideal MHD helical (“kink”) convective instability and/or a long wavelength resistive helical (“kink”) convective instability (tearing mode). The long wavelength ideal MHD helical instability will lead to helical rotation and thus unwinding due to diamagnetic effects and plasma ejections due to convection. The long wavelength resistive helical instability will lead to both unwinding and plasma ejections, but also to accelerated plasma flow, long wavelength magnetic field filamentation, accelerated particles and long wavelength heating internal to the prominence.

Surface problems in magnetic confinement systems

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-313-C7-316
Author(s):  
F. Waelbroeck ◽  
I. Ali-Khan ◽  
K. J. Dietz ◽  
P. Wienhold
Keyword(s):  
Magnetic Confinement
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