The study of the relativistic dynamics of charged particles moving in electric and magnetic fields is of prime importance in accelerator and plasma physics, where such devices as the cyclotron, tokamak, and free-electron laser are frequently encountered [1,2]. The recent surge of interest in this study stems partly from theoretical and experimental findings that such particles are capable of ex...

The Korea Superconducting Tokamak Advanced Research (KSTAR) device site assembly was completed by May 2007. During the assembly period, several key technologies were developed to assemble the superconducting tokamak and its ancillary systems. As will be described in this paper, we encountered several problems and difficulties that mainly stemmed from the uniqueness of the superconducting tokama...

KSTAR is an advanced tokamak with fully superconducting coils for the steady state research, which began in December 1995 and was completed in July 2008. As a single science project, it has been marked as the largest construction project in the history of Korea. During the construction period, we encountered several challenges, such as technical issues, cost overrun and schedule slippage. Never...

The SMall Aspect Ratio Tokamak (SMART) device is a new compact (plasma major radius Rgeo?0.40 m, minor a?0.20 aspect ratio A?1.7) spherical tokamak, currently in development at the University of Seville. SMART has been designed to achieve magnetic field plasma center up B?=1.0 T with currents Ip=500 kA and pulse length ?ft=500 ms. A wide range shaping configurations are envisaged, including tri...

A novel divertor biasing using four plates that are arranged toroidally every 90◦ on the upper plate is applied to low-density plasmas of QUEST spherical tokamak. When some these biased in-phase by applying a sawtooth waveform voltage 85-V amplitude and 50-Hz repetition, up approximately 35% reduction particle flux observed during positive biasing. The input power for 0.2 kW tokamak produced ∼1...

The simulation of the interaction between macroscopic Alfvén modes and a population of hot ions is one of the challenges in tokamak plasma physics, mainly because of its possible negative impact on the plasma confinement in a future fusion device. The bi-fluid XTOR-2F code [1], using a fully implicit method with an iterative pre-conditioned Newton-Krylov for its solution at every time step has ...