# Effect of local EÃ—B flow shear on the stability of magnetic islands in tokamak plasmas

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- Flow shear induced fluctuation suppression in finite aspect ratio shaped tokamak plasma. Hahm, T. S.; Burrell, K. H. // Physics of Plasmas;May95, Vol. 2 Issue 5, p1648
Studies the suppression of turbulence by the ExB flow shear and parallel flow shear in an arbitrary shape finite aspect ratio tokamak plasma using the two point nonlinear analysis previously utilized in high aspect ratio tokamak plasma. Role of the ExB flow shear in the suppression of...

- Beyond paradigm: Turbulence, transport, and the origin of the radial electric field in low to... Moyer, R.A.; Burrell, K.H.; Carlstrom, T.N.; Coda, S.; Conn, R.W.; Doyle, E.J.; Gohil, P.; Groebner, R.J.; Kim, J.; Lehmer, R.; Peebles, W.A.; Porkolab, M.; Rettig, C.L.; Rhodes, T.L.; Seraydarian, R.P.; Stockdale, R.; Thomas, D.M.; Tynan, G.R.; Watkins, J.G. // Physics of Plasmas;Jun95, Vol. 2 Issue 6, p2397
Examines the paradigm of shear suppression of turbulence as the mechanism for the low to high (L to H) confinement mode transition, by quantitative comparison of the predictions of the paradigm with experimental results from the DIII-D tokamak. Triggering of a VxB rotation due to the L to H...

- Large-mode-number magnetohydrodynamic instability driven by sheared flows in a tokamak plasma with reversed central shear. Bierwage, Andreas; Qingquan Yu; Günter, Sibylle // Physics of Plasmas;Jan2007, Vol. 14 Issue 1, p010704
The effect of a narrow sub-AlfvÃ©nic shear flow layer near the minimum qmin of the tokamak safety factor profile in a configuration with reversed central shear is analyzed. Sufficiently strong velocity shear gives rise to a broad spectrum of fast growing Kelvin-Helmholtz (KH)-like ideal...

- Dependence of the low to high confinement mode transition power threshold and turbulence flow shear on injected torque. Schlossberg, D. J.; McKee, G. R.; Fonck, R. J.; Burrell, K. H.; Gohil, P.; Groebner, R. J.; Shafer, M. W.; Solomon, W. M.; Wang, G. // Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p080701
The power required to induce a bifurcation from a low-confinement mode to a high-confinement mode in DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] plasmas is found to depend sensitively on the injected neutral beam torque and consequent toroidal rotation. Plasmas exhibit a factor of...

- Stability of resistive and ideal ballooning modes in the Texas Experimental Tokamak and DIII-D. McCarthy, D. R.; Guzdar, P. N.; Drake, J. F.; Antonsen, T. M.; Hassam, A. B. // Physics of Fluids B: Plasma Physics;Jul92, Vol. 4 Issue 7, p1846
The stability of drift resistive ballooning modes is examined using the reduced Braginskii equations, which include electron temperature and magnetic fluctuations. The Texas Experimental Tokamak (TEXT) [Phys. Fluids B 2, 2879 (1990)] edge plasma is found to be unstable for a broad range of mode...

- TFTR Mirnov loop system. Fredrickson, E.; Colchin, R.; McGuire, K.; Morris, W.; Sauthoff, N. // Review of Scientific Instruments;Aug1986, Vol. 57 Issue 8, p2084
Magnetic pick-up loops (Mirnov coils) located on the inner wall of the tokamak fusion test reactor (TFTR) vacuum vessel have been used to study magnetic fluctuations in the plasma. To study the high-frequency magnetic turbulence associated with beam injection, the signal from one coil is passed...

- Dynamically stable, self-similarly evolving, and self-organized states of high beta tokamak and reversed pinch plasmas and advanced active control. Kondoh, Yoshiomi; Fukasawa, Toshinobu // Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p112504
Generalized simultaneous eigenvalue equations derived from a generalized theory of self-organization are applied to a set of simultaneous equations for two-fluid model plasmas. An advanced active control by using theoretical time constants is proposed by predicting quantities to be controlled....

- Resistive edge mode instability in stellarator and tokamak geometries. Mahmood, M. Ansar; Rafiq, T.; Persson, M.; Weiland, J. // Physics of Plasmas;Sep2008, Vol. 15 Issue 9, p092507
Geometrical effects on linear stability of electrostatic resistive edge modes are investigated in the three-dimensional Wendelstein 7-X stellarator [G. Grieger et al., Plasma Physics and Controlled Nuclear Fusion Research 1990 (International Atomic Energy Agency, Vienna, 1991), Vol. 3, p. 525]...

- The influence of the ion polarization current on magnetic island stability in a tokamak plasma. Fitzpatrick, R.; Waelbroeck, F. L.; Militello, F. // Physics of Plasmas;Dec2006, Vol. 13 Issue 12, p122507
The influence of the ion polarization current on the stability of a constant-Ïˆ magnetic island in a tokamak plasma is investigated numerically using a reduced two-fluid model in two-dimensional slab geometry. The polarization current is found to be negligibly small when the island is either...