Non-linear coupling to lower-hybrid waves in a tokamak plasma

Resonant Parametric Excitation in Lower-hybrid Heating of Tokamak Plasma*

Lower-hybrid waves in a plasma with negative ions

The introduction of an electronegative gas (i.e., a gas with a large electron attachment cross section, e.g., SF6) into a plasma has made it possible to study plasmas in which the negative ion density can be much larger than the electron density. lp2 In such a plasma, new phenomena may be expected to occur, in particular, various electrostatic wave modes are modified by the presence of negative...

Absorption of lower hybrid waves in the scrape off layer of a diverted tokamak

The goal of the Lower Hybrid Current Drive (LHCD) system on the Alcator C-Mod tokamak is to investigate current profile control under plasma conditions relevant to future devices such as ITER and DEMO. Experimental observations of an LHCD " density limit " for C-Mod are presented in this paper. Bremsstrahlung emission from relativistic fast electrons in the core plasma drops suddenly above line...

Control of a non-linear PDE system arising from non-burning tokamak plasma transport dynamics

The control of kinetic profiles is among the most important problems in fusion reactor research. It is strongly related to a great number of other problems in fusion energy generation such as burn control, transport reduction, confinement time improvement, MHD instability avoidance and highor high-confinement operating modes access. We seek a controller which is able to make the kinetic profile...

a new type-ii fuzzy logic based controller for non-linear dynamical systems with application to 3-psp parallel robot

abstract type-ii fuzzy logic has shown its superiority over traditional fuzzy logic when dealing with uncertainty. type-ii fuzzy logic controllers are however newer and more promising approaches that have been recently applied to various fields due to their significant contribution especially when the noise (as an important instance of uncertainty) emerges. during the design of type- i fuz...