Promotion of interdisciplinary research through UNIT (1/2)
Address the "unsolved problems" of fusion science through "academic formulation" of them,by establishing the "interdisciplinary joint research structure."
UNIT

Axis

ThemeDynamics,
space-time

Reconsidering the hierarchy of fusion plasma phenomena from a bird's-eye view (meta) perspective,
we reformulate contributions from micro-models and macro-models to construct a physical model that
expresses multi-layered dynamics and explore the universality inherent therein. We will utilize
methodologies obtained through both theoretical and experimental studies to establish academic
collaborations both within and outside the field.

SystemUsing fusion plasmas as a subject, explore universal laws behind structure formation common tovarious systems and contribute to establishing more efficient and sustainable confinement methods forplasmas. The knowledge from these studies will be fed back to the design and optimization method of
the magnetic coils that generate the confinement field.

Phase space
turbulence

Fluctuation,
Turbulence,
Transportation

Experimental research on phase space plasma fluctuations is carried out to provide answers toanomalous transport, which is an unsolved problem in fusion plasma research. Taking guidance fromtheoretical and simulation studies, we simultaneously measure the velocity distribution function atmultiple points in space and observe the phase space structure. Complementary research developmentwith other research areas where the particle nature of plasma becomes notable (e.g., laser-plasmainteraction and magnetospheric plasma) will contribute to understanding non-equilibrium andnonlinear plasma physics.

Plasma Quantum
Processes

Elementary
process,
Interaction

From the quantum processes of atoms, molecules, and light occurring in plasma and matter, we clarify
how the collective properties and dynamics are determined and how they are observed as collective
phenomena. Quantitative physics models of non-equilibrium and high-density plasmas in fusion
reactors, celestial bodies, and the universe will be developed to elucidate universal physics forcollective phenomena on a wide variety of scales.

Transports inPlasma Multi-Phase
Matter System

Different-phase
coupledphenomenaThis research aims to understand and control heat, particles, and momentum transport phenomena
due to interactions between plasmas and solids, liquids, and gases in the open magnetic field region
where magnetic confinement plasma connects to walls. The knowledge and technologies obtained
from such research will be applied to fields other than the fusion field to contribute to advancing thosefields.

Meta-hierarchy
dynamics

Structure formationand sustainability

Promotion of interdisciplinary research through UNIT (2/2)
Address the "unsolved problems" of fusion science through "academic formulation" of them,by establishing the "interdisciplinary joint research structure."
UNIT

S&I: Sensing andIntellectualization

Plasma Apparatus

Complex Global
Simulation

Ultrahigh-flux
concertingmaterials
AppliedSuperconductivity
and Cryogenics

Axis

ThemeMeasurement,
data

Innovative measurement, analysis, and expression methods and a new system for understanding
nature that integrate them will be realized. We will tackle unresolved problems in fusion sciencethrough unprecedented measurement with high spatial and temporal resolution, data analysis using
statistical mathematics and data science methods, and advanced information conversion to visual,auditory, and tactile senses.

Device Science,
Technology

To create new measurement and control technologies for charged particles by improving the existingmeasurement and control technologies in plasma and fusion science experiments. Always keep a broad
perspective, collaborate and fuse with other fields, and use these technologies to explore methods tobring about qualitative changes in the deepening of natural sciences (including applied sciences) andmethods to pursue new developments in natural sciences.

Computing
Science

Global simulations that consider the interactions between hierarchies are necessary to understand thebehavior of systems composed of multiple hierarchies. We will develop a coupling method between
hierarchies and different physical models to realize a global simulation of the entire magneticallyconfined fusion plasma, including the core and boundary plasma, and establish a methodology withbroad applicability.

Materialscience

In fusion, nuclear power, space, aerospace, chemical plants, etc., materials are used in harshenvironments where ultra-high flux energy and particles are injected into the materials. We aim toinvestigate and systematize the fundamental laws governing the adaptation and life of materials insuch harsh environments, create high-strength, high-performance, long-life materials that will
revolutionize engineering systems under harsh environments, and establish life prediction theory.

Cryogenics

We will conduct academic research to establish innovative superconducting magnet and lowtemperature technology with high performance and versatility under high reliability and contribute to
the long-term goal of fusion and the medium- to short-term goal of creating a carbon-neutral society.
We are also researching and developing liquid hydrogen, which is attracting attention as a "cleanenergy."