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Волков, Е. Д.; Berezhnyi, V.L.; Bondarenko, V.N.; Chechkin, V. V.; Fomin, I.P.; Григорьева, Л.И.; Konovalov, V.G.; Kulaga, A. E.; Litvinov, A.P.; Lozin, A.V.; Mironov, Yu.K.; Nazarov, N.I.; Ocheretenko, V. L.; Romanov, V. S.; Shapoval, A. N.; Skibenko, A. I.; Slavnyi, A.S.; Sorokovoi, E.L.; Tarasov, I. K.; Shcherbinina, T. E.

doi:10.1023/a:1026340422646

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…It is shown here that even narrow islands can lead to shear. One can note that several poloidal chains of islands, observed in [7], are better for shear formation on longer radial interval.…”

Section: Introductionmentioning

confidence: 88%

“…On the plasma cross-section 0 < r < a, several chains of magnetic islands can exist [7]. However, we consider the influence of a poloidal chain of islands on shear formation for a simple case.…”

Section: Shear Formation By Magnetic Islandsmentioning

confidence: 99%

“…Currently, the formation [5,6] and role [4,[7][8][9] of magnetic islands in nuclear fusion plasma are being investigated intensively. In particular, their effect on ITB formaauthor's e-mail: vmaslov@kipt.kharkov.ua tion is very important.…”

Section: Introductionmentioning

confidence: 99%

“…In experiments [4] involving sufficient plasma heating, the plasma confinement was better in the presence of a poloidal chain of magnetic islands than in their absence. In some experiments [7,8], the shear was formed by a poloidal chain of magnetic islands with sufficient plasma heating. This study shows that the electrons start to miss magnetic islands because of sufficient plasma electron heating near the rational surface with the poloidal chain of magnetic islands, and the shear is formed.…”

Section: Introductionmentioning

confidence: 99%

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Shear Formation by a Poloidal Chain of Magnetic Islands

Maslov

Porcelli

2008

Plasma and Fusion Research

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We estimate the electron angular velocity shear ∂ r ω θo , which can be formed by plasma heating near the loworder rational surface with a poloidal chain of magnetic islands. We suppose that the plasma is heated sufficiently that its electrons start to miss the magnetic islands during their radial collisional shift and movement along the toroidal surface. This provides an ion volume charge in some regions of magnetic islands, which leads to shear formation. The time taken for shear formation is short. The conditions for magnetic island width leading to the shear are derived. It is shown that even narrow magnetic islands can lead to the shear. The shear can damp instabilities with a growth rate smaller than the ion cyclotron frequency. The spatial structures of convective vortical cells are described. We derive inverse dependences of the radial width of excited vortices on ∂ r ω θo and radial gradient of plasma density ∂ r n 0e . Amplitude of electron radial oscillations is smaller for larger ∂ r ω θo and ∂ r n 0e . These dependences promote a steep radial distribution of the plasma density and internal transport barrier.

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Section: Introductionmentioning

confidence: 88%

Section: Shear Formation By Magnetic Islandsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shear Formation by a Poloidal Chain of Magnetic Islands

Maslov

Porcelli

2008

Plasma and Fusion Research

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Behavior of RF Discharge Plasmas in the Uragan‐3M and Uragan‐2M Torsatrons

Pankratov¹,

Beletskii

Berezhnyj

et al. 2010

Contrib. Plasma Phys.

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In the Uragan‐3M (U‐3M) and Uragan‐2M (U‐2M) torsatrons possibilities and prospects of Alfvén method utilization for wall conditioning, plasma production and heating are studied. In U‐3M the effect of fast ion loss on H‐like mode formation is investigated. In U‐2M the wall conditioning associated with the chemical reactivity of the atomic hydrogen to create volatile substances is used. A compact four‐strap antenna is proposed for Alfvén resonance heating in U‐2M (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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