Webthe Mercier and ballooning localized stability criteria. The Heliac concept was revived in the early 1980s because of computational studies in the limit of helical symmetry which … Web31 dec. 1996 · Abstract The ideal MHD Mercier criterion for the stability of localized interchange modes is easily violated by modest pressure gradients in the central region of a Tokamak plasma where the magnetic winding index q drops below unity. However, kinetic effects can substantially modify this criterion, allowing for stable peaked pressure profiles.
CALCULATION OF MERCIER STABILITY LIMITS OF TOROIDAL …
WebThe main results are that i) two MHD instabilities have been identified during current ramp-up discharges (resistive 'multiple' tearing mode and ideal interchange mode) and ii) a new approach to diagnose edge localized modes (ELMs) using ECE diagnostics was explored. Both MHD modes were accompanied by hollow pressure and current profiles. WebThe kinetic effects on the ideal ballooning and interchange/Mercier modes are studied in model equilibria for an L52 heliotron, large helical device ~LHD!@A. Iiyoshi et al., Nucl. Fusion 39, 1245 ~1999!#. It is shown that the ion finite Larmor radius~FLR! effect stabilizes the modes with high toroidal mode number, n. boca landscape lighting
On plasma edge ideal MHD stability/instability condition in …
Web16 nov. 2000 · When kinetic effects were added, the ideal Mercier mode was finite ion Larmor radius stabilized. However, ion Landau damping was found to be strong enough … Web31 dec. 1996 · Furthermore, there is evidence that the Mercier stability condition can also be violated in some cases. Here, we show more » that toroidal rotation of the plasma can … WebA statistical approach of dynamic necking instabilities Article A fundamental statistical framework is developed to analyze from finite element simulations the evolution of small initial defects... clock enchantments