Efficient, high-gain operation of a tokamak device requires the achievement of certain radial shapes for the toroidal current profile. The evolution in time of the toroidal current profile in tokamaks is related to the evolution of the poloidal magnetic flux profile. A model-based control approach for the regulation of the poloidal magnetic flux profile at the DIII-D tokamak is proposed in this...

A new reduced size ITER-RC superconducting tokamak concept is proposed with the goals of studying burn physics either in an inductively driven standard tokamak (ST) mode of operation, or in a quasi-steady state advanced tokamak (AT) mode sustained by non-inductive means. This is achieved by reducing the radiation shield thickness protecting the superconducting magnet by 0.5 m relative to ITER a...

We construct a model for the turbulence near X-point of Tokamak device and, under suitable assumptions, we arrive to closed equation electric field potential fluctuations. The analytical and numerical analysis is focused on reduced two-dimensional formulation dynamics, which allows direct mapping incompressible Navier-Stokes equation. main merit this study outline how X-point, in correspondence...

In this research we investigated the effects of toroidal field ripple of tokamak on the plasma internal inductance. For this purpose, array of magnetic probes and also a diamagnetic loop with its compensation coil were designed, constructed, and installed on outer surface of the IR-T1 tokamak. Amplitude of the TF ripple is obtained 0.01, and also the effect of the TF ripple on the plasma intern...

Nonlinear electromagnetic stabilization by suprathermal pressure gradients found in specific regimes is shown to be a key factor in reducing tokamak microturbulence, augmenting significantly the thermal pressure electromagnetic stabilization. Based on nonlinear gyrokinetic simulations investigating a set of ion heat transport experiments on the JET tokamak, described by Mantica et al. [Phys. Re...

The unique flexibility of TCV in plasma shaping has been exploited to address different aspects of tokamak physics, for which the plasma shape may play a role. This paper summarizes the experiments undertaken in the TCV tokamak ("Tokamak à Configuration Variable") over the last decade essentially in stability and transport. This paper enables a comprehensive and integrated view of the various s...

As everyone known the significant progresses have been achieved on tokamaks, which means that the scientific feasibility of tokamak reactor for fusion energy has been achieved (Q=1). But for commercial power plan the economics will be very important. Therefore to find improved (advanced) confinement operation model is the popular topic always for tokamak research. On other hand if any tokamak o...

A kinetic simulation code based on the gyrokinetic ion dynamics in global general metric (including a tokamak with circular or noncircular cross–section) has been developed. This gyrokinetic simulation is capable of examining the global and semi–global driftwave structures and their associated transport in a tokamak plasma. We investigate the property of the ion temperature gradient (ITG) or ηi...