Research Report2014
Destroy the Symmetry Slightly and Skillfully Confine the Plasma
Seeking the realization of the future fusion energy, in the magnetic field confinement device we are progressing in research on confining high-temperature, high-pressure plasma in the magnetic field container. ...
Maintaining Plasma for Extended Duration: Enhancing the Performance of Steady-state Plasma through Increased Heating
In order to generate energy through nuclear fusion, plasma of a density of 100,000,000,000,000 parts per 1cc must be at a temperature that exceeds 120,000,000 degrees. ...
Natural Radioactive Sources which Use Materials in Our Daily Lives: Developing Practical Radiation Education Methods
Due to the nuclear power plant accident at Fukushima, the necessity of spreading proper understanding and education of radiation is increasing. ...
Investigating the Light from Tungsten: The Condition of Tungsten in a High-Temperature Plasma
In fusion plasma experiment devices beginning with the Large Helical Device (LHD), as well as the International Thermonuclear Experimental Reactor (ITER), plasma is confined in a magnetic field container and made to float in the vacuum so that the high-temperature plasma does not directly touch the vessel wall. ...
Intertwined in a Complicated Manner, Dispersing Heat: Control of the Peripheral Area through the Structure of the Magnetic Field Lines
Plasma cannot freely move vertically in the magnetic field lines, but plasma have the quality of moving extremely fast along the magnetic field lines. ...
Changing the Orbit by Collison: The Transport of Particles and Heat Caused by Collisions of Charged Particles
In magnetic fusion devices, beginning with the Large Helical Device (LHD), high-temperature high-density plasma is confined in the magnetic field lines container having a doughnut configuration. ...
Measuring Ion Temperature from the Movement of Electrons: The Microwave Collective Thomson Scattering Method
In the future, in order to produce energy through fusion, at a density of 100 trillion parts per one cubic centimeter the temperature of hydrogen ions must exceed 120,000,000 degrees. ...
Efficiently Confining High-pressure Plasma: Research on the Amount of Plasma Leakage
In the Large Helical Device (LHD), research is advancing on stable confinement of high-pressure plasma for a long duration in a nested container composed by magnetic field lines. ...
Measuring the Energy of Light Emitted from Plasma: Bolometer Diagnostics
In the Large Helical Device (LHD), high-temperature plasma is confined by a container made from magnetic field lines. ...
The Heating Region Expanded by Frequencies Two or Three Times Greater: Electromagnetic Wave Heating Using Higher Harmonic Waves
In the Large Helical Device (LHD), in generating high-temperature plasma, in particular, in heating electrons in a plasma, a powerful electromagnetic wave of 77 gigahertz (77,000 megahertz) frequency is used. ...
Magnets for fusion energy: A revolutionary manufacturing method developed
The National Institute for Fusion Science (NIFS), of the National Institutes of Natural Sciences (NINS) in Japan, has achieved an electrical current of 100,000 amperes, which is by far the highest in the world, by using the new idea of assembling the state-of-the-art yttrium-based high-temperature superconducting tapes to fabricate a large-scale magnet conductor. ...
Confining High-energy Particles: Detecting Lost Ions
In the Large Helical Device (LHD) we are heating high-temperature, high-density plasma confined in the magnetic field by high-energy particles whose energy is much higher than that of ions and electrons in the plasma. ...
Challenging Big Data: Fusion Experiments Supported by Leading Edge Japanese Information Technology
During 2013, in the Large Helical Device (LHD) we collected 891.6 gigabytes of diagnostic data per experiment, an average which became a new world record for the amount of data collected in this field. ...
Making Beautiful Hydrogen Ice: The Application of Extreme Low-temperature Technology to Laser Fusion
In a magnetic confinement fusion experimental device such as the Large Helical Device (LHD), we confine high-temperature plasma through the strength of the magnetic field. ...
Let’s Try to Destroy a Plasma: Stable Confinement of High-pressure Plasma
In the Large Helical Device (LHD) we are confining high-pressure plasma of high-temperature and high-density by utilizing the pressure of the magnetic field. ...
Solving the Multi-Layer Phenomena of Plasma through Computer Simulation
In the Large Helical Device (LHD) plasmas whose temperatures exceed 100,000,000 degrees are confined by a magnetic field. Because the behavior of such plasmas is extremely complicated, utilizing computer simulations we are carrying out reproductions and predictions from experiment results. ...
Producing a Negative Hydrogen Ion: A Negative Ion-type Neutral Particle Injection Heating Device
In the Large Helical Device (LHD), one of the methods used for heating plasma that has been confined by the magnetic field lines container is the NBI (a neutral particle injection heating device; Neutral Beam Injection), which is a method that injects into plasma a hydrogen atom beam that has been accelerated by high energy. ...
Measuring Electron Temperature above 200,000,000 Degrees: Using the Thompson Scattering Measurement Instrument
In the Large Helical Device (LHD) an electron temperature exceeding 200,000,000 degrees has been measured. Because such a high temperature cannot be measured by a conventional thermometer, we take measurements by utilizing a powerful laser beam. ...
Injecting Impurities by Pinpoint: Tracer Encapsulated Solid Pellet
In order to realize the future fusion energy generation it is necessary to maintain high-temperature plasma confined by a magnetic field. ...
The “Flare of My Dreams” in My Mind: Integrated Simulation Research
Experiment-based research that aims at achieving the future fusion energy is moving forward in the Large Helical Device (LHD). ...
Composing the Full Image of the Fusion Power Generation Plant: System Design Research
At the National Institute for Fusion Science, in seeking the future fusion power generation we are moving forward with conceptual designs for the helical fusion reactor. ...
A Cooling Design for the Superconducting Coils in the Helical Fusion Reactor
At the National Institute for Fusion Science we are advancing design research for the Force-Free Helical Reactor (FFHR) in moving toward the future fusion power plant. ...
Injecting Hydrogen Ice into Plasma: Supplying Particles through Solid Hydrogen Pellets
In the generation of fusion power in the future, in addition to maintaining the burning, a high-temperature plasma will be controlled by supplying fuel gas from outside into that high-temperature plasma. ...
Clarifying the Circulation Process of Plasma Particles: Simulations of Plasma at the Periphery
In the generation of fusion power in the future, the fuel to be supplied from outside will burn in a high-temperature plasma state. ...