RT Journal Article
T1 Emergence and decay rate of the edge plasma flow shear near a critical transition
A1 Delgado, José María
A1 García Gonzalo, Luis
A1 Carreras, Benjamín A.
AB Recently, the experimental results for the emergence of the plasma shear flow layer in TJ-II have been explained as a second-order phase transition like process by using a simple model of envelope equations for the fluctuation level, the averaged poloidal velocity shear and the pressure gradient (2006 Phys. Plasmas 13 122509). Here, we extend this model by incorporating radial coupling. The model is applied to the study of the turbulence-shear flow interaction when the energy flux is low. Transition dynamics and their concomitant thresholds are examined within the context of this model. The effect of an external torque induced by electrode biasing has also been considered. In particular, we analyze the decay rate of the shear flow after switching off the biasing.
PB IOP Publishing
SN 0741-3335 (Print)
SN 1361-6587 (Online)
YR 2009
FD 2009-01
LK https://hdl.handle.net/10016/7413
UL https://hdl.handle.net/10016/7413
LA eng
NO 16 pages, 14 figures.-- PACS nrs.: 52.35.Ra, 52.30.-q, 52.70.-m, 52.25.Gj, 52.25.Fi.-- Special section: Papers from the 10th International Workshop on Fast Ignition of Fusion Targets (Hersonissos, Crete, Greece, Jun 12-18, 2008).
NO This research was sponsored in part by the DGI (Dirección General de Investigación) of Spain under project No ENE2006-15244-C03-01 and by CM-UC3M (Comunidad de Madrid - Universidad Carlos III) Project No CCG07-UC3M/ESP-3407.
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RD 1 sept. 2024