| 1. |
- Severo, J. H. F., et al.
(author)
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Magnetic islands and plasma rotation in the Tokamak Chauffage Alfven Bresilien tokamak
- 2004
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In: Physics of Plasmas. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 11:2, s. 846-848
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Journal article (peer-reviewed)abstract
- Collisional plasma rotation in the Tokamak Chauffage Alfven Bresilien (TCABR) tokamak [J. H. F. Severo, I. C. Nascimento, V. S. Tsypin, and R. M. O. Galvao, Nucl. Fusion 43, 1047 (2003)] has been experimentally studied. It was found that the measured plasma poloidal rotation velocity agrees within error limits with neoclassical theoretical predictions, and toroidal velocity with experimental results obtained in analogous tokamaks, almost everywhere along the minor radius r, except for measurements at r/asimilar or equal to0.56 and r/asimilar or equal to0.89 (the minor radius of TCABR tokamak a=18 cm). For the first point, the measured plasma rotation velocities are higher than the velocity of the background plasma, respectively similar to30% and similar to10% for the poloidal and toroidal rotation velocities. Using a set of 22 Mirnov coils displaced poloidally, magnetic field perturbations were measured in shots adjusted to reproduce the ones of the previous plasma rotation measurements, and the results confirm that in the region r/asimilar or equal to0.89 the plasma rotates together with the magnetic island (3,1).
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| 2. |
- Severo, J. H. F., et al.
(author)
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Neoclassical ion transport in the edge of axially-symmetric arbitrary cross-section tokamak with plasma subsonic toroidal flows
- 2002
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In: Brazilian journal of physics. - 0103-9733 .- 1678-4448. ; 32:1, s. 13-19
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Journal article (peer-reviewed)abstract
- General metrics of large aspect ratio tokamaks is used in the paper. General expressions for the neoclassical poloidal plasma rotation V-2(theta) and radial ion heat flux Gamma(Ti) are obtained. Their dependence 2 on the squared Mach number alpha = U-zetai(2)/c(5)(2) is analyzed (here U-zetai is the ion toroidal velocity and c(s) is the sound velocity, respectively). Some interesting peculiarities of this dependence are emphasized.
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| 3. |
- Tsypin, V. S., et al.
(author)
-
Particle flows in dusty plasmas of the tokamak edge
- 2004
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In: Physics of Plasmas. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 11:8, s. 4138-4141
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Journal article (peer-reviewed)abstract
- In this Brief Communication the plasma flows and ambipolar electric field induced due to the temperature stresses on ions are estimated. These flows are similar to the plasma residual rotations in tokamaks, but are related to dust contamination of tokamak plasmas. The induced electric field might be very important for creating transport barriers in tokamaks.
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| 4. |
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