Role of E × B Shear and Magnetic Shear in the Formation of Transport Barriers in DIII-D

2005 ◽  
Vol 48 (2) ◽  
pp. 1021-1041 ◽  
Author(s):  
K. H. Burrell
Keyword(s):  
Magnetic Shear ◽  
Transport Barriers

Bursty transport in tokamak turbulence: Role of zonal flows and internal transport barriers

2001 ◽  
Vol 41 (8) ◽  
pp. 995-1001 ◽  
Author(s):  
S. Benkadda ◽  
P. Beyer ◽  
N. Bian ◽  
C. Figarella ◽  
O. Garcia ◽  
...  
Keyword(s):  
Zonal Flows ◽  
Transport Barriers ◽  
Internal Transport Barriers ◽  
Internal Transport

scholarly journals Suppressing electron turbulence and triggering internal transport barriers with reversed magnetic shear in the National Spherical Torus Experiment

2012 ◽  
Vol 19 (5) ◽  
pp. 056120 ◽  
Author(s):  
J. L. Peterson ◽  
R. Bell ◽  
J. Candy ◽  
W. Guttenfelder ◽  
G. W. Hammett ◽  
...  
Keyword(s):  
Spherical Torus ◽  
Magnetic Shear ◽  
Transport Barriers ◽  
Internal Transport Barriers ◽  
Internal Transport

Role of trapped and circulating particles in inducing current drive and radial electric field by Alfvén waves in tokamaks

2002 ◽  
Vol 67 (5) ◽  
pp. 301-308 ◽  
Author(s):  
V. S. TSYPIN ◽  
R. M. O. GALVÃO ◽  
I. C. NASCIMENTO ◽  
M. TENDLER ◽  
J. H. F. SEVERO ◽  
...  
Keyword(s):  
Electric Field ◽  
Radial Electric Field ◽  
Alfven Waves ◽  
Current Drive ◽  
Alfvén Waves ◽  
Trapped Particles ◽  
Transport Barriers

Absorption by trapped particles is supposed to seriously hinder current drive by Alfvén waves. However, it is shown in this paper that the same effect is rather beneficial for the emergence of the radial electric field induced by these waves, which is important for creating and maintaining transport barriers in tokamaks.

Transport barriers with magnetic shear in a tokamak

2007 ◽  
Vol 73 (4) ◽  
pp. 439-453 ◽  
Author(s):  
M. EL MOUDEN ◽  
D. SAIFAOUI ◽  
A. DEZAIRI ◽  
B. ZINE ◽  
M. EDDAHBY
Keyword(s):  
Anomalous Transport ◽  
Particle Diffusion ◽  
Magnetic Shear ◽  
Transport Barriers ◽  
Simulation Results ◽  
Reversed Shear

AbstractThe reversed magnetic shear is the most important factor in the study of the plasmas of a tokamak. In this paper we focus our research, as a first stage, on the control of the improved confinement regimes by studying the influence of the reversed shear on its quality in the plasma of a tokamak and especially in reducing the anomalous transport in ITER. Then we study the influence of the perturbation modes on the particle diffusion. At the end, a comparison between simulation results obtained using ITER and TEXT parameters is carried out.

Heat Convection and Transport Barriers in Low-Magnetic-Shear Rijnhuizen Tokamak Project Plasmas

2000 ◽  
Vol 85 (21) ◽  
pp. 4534-4537 ◽  
Author(s):  
P. Mantica ◽  
G. Gorini ◽  
G. M. D. Hogeweij ◽  
N. J. Lopes Cardozo ◽  
A. M. R. Schilham
Keyword(s):  
Heat Convection ◽  
Magnetic Shear ◽  
Transport Barriers

Confinement in W7-AS and the role of radial electric field and magnetic shear

1997 ◽  
Vol 39 (12B) ◽  
pp. B273-B286 ◽  
Author(s):  
R Brakel ◽  
M Anton ◽  
J Baldzuhn ◽  
R Burhenn ◽  
V Erckmann ◽  
...  
Keyword(s):  
Electric Field ◽  
Radial Electric Field ◽  
Magnetic Shear

scholarly journals The role of zonal flows and predator–prey oscillations in triggering the formation of edge and core transport barriers

2014 ◽  
Vol 54 (7) ◽  
pp. 073012 ◽  
Author(s):  
L. Schmitz ◽  
L. Zeng ◽  
T.L. Rhodes ◽  
J.C. Hillesheim ◽  
W.A. Peebles ◽  
...  
Keyword(s):  
Zonal Flows ◽  
Predator Prey ◽  
Transport Barriers

The role of flow shear in the ballooning stability of tokamak transport barriers

2004 ◽  
Vol 11 (5) ◽  
pp. 2135-2143 ◽  
Author(s):  
A. J. Webster ◽  
H. R. Wilson ◽  
A. M. M. Scaife
Keyword(s):  
Flow Shear ◽  
Transport Barriers
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