- Research Activities
- Large Helical Device Project
- Numerical Simulation
- The Fusion Engineering Research Project
- Department of Helical Plasma Research
- High-Density Plasma Physics Research Division
- High-Temperature Plasma Physics Research Division
- Plasma Heating Physics Research Division
- Device Engineering and Applied Physics Research Division
- Fusion Systems Research Division
- Fusion Theory and Simulation Research Division
- Fundamental Physics Simulation Research Division
- Rokkasho Research Center
- Collaborative Research
- Collaborative Research
- Japan-United States Collaboration Program
- Japan-Korea Collaboration Program
- A3 Foresight Program
- International Energy Agency (IEA) Implementing Agreement for Cooperation in Development of Stellarator-Heliotron Concept
- Atomic Molecular Database
- International Stellarator/Heliotron Confinement/Profile Database [ISH-C/P DB]
- Database of Superconducting Magnet for Fusion
- "Plasma and Fusion Research," JSPFJ
A fusion plasma is a typical complex system that is controlled by multi-physics and multi-time/space nonlinear processes, from macroscopic phenomena, such as plasma transport, to the microscopic electron dynamics. In order to understand and systematize physical mechanisms in fusion plasmas, large-scale numerical simulation research has been carried out by utilizing the full capability of a supercomputer. Based on this research and development, we will promote large-scale simulation science aimed at the ultimate realization of a helical numerical test reactor which will be an integrated predictive model for plasma behavior over the whole machine range.
We analyze the behavior of a magnetically confined plasma through a magnetohydrodynamic (MHD) approach. This approach allows us to treat global phenomena in the time scale slower than each particle motion. We carry out computer simulations to analyze the plasmas destabilized by the plasma current and the pressure gradient, and to search for stable magnetic configurations.
|Kinetic Transport Simulation
In high-temperature plasmas confined in fusion devices, the transport of particles and heat is driven by the inhomogeneity of the magnetic field, density, and temperature profiles. Using supercomputers, we examine particle motions and their collective properties causing turbulence, and investigate more efficient ways in which the plasmas are well confined.
|Plasma-Wall Interaction Simulation
We estimate the durability of divertor plates made of various kinds of materials, such as graphite and diamond, against plasma exposure by use of molecular dynamics (MD) simulation.
The Plasma Simulator is utilized to promote the Numerical Simulation Research Project. The Plasma Simulator is a massive parallel supercomputer with a computational performance of 315 teraflops, a main memory of 40.25 terabytes, and a storage system capacity 2 petabytes. Collaborators can remotely use the Plasma Simulator from their own research sites through the Internet.
|Three-dimensional Immersive Virtual-Reality System “CompleXcope”
The three-dimensional (3D) Immersive Virtual-Reality (VR) System “CompleXcope” can make a viewer feel as if they are in the simulation world, because the system does not show 3D objects only from one direction of the eyes of the viewer, but also displays 3D objects in the 3D space of the viewer. In order to research the plasma simulation results, in which the plasma shows complex shapes and behaviors spatiotemporally, we are investigating the VR visualization. Furthermore, we are attempting an implementation toward the optimization of LHD by re-creating the plasma dynamics in the interior of the LHD.