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Tsutsui Lab
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A lab studying nuclear fusion and superconductivity, producing and storing energy with strong magnetic fields.
AboutAbout the lab
Producing and storing energy with strong magnetic fields
Tsutsui Lab studies nuclear fusion, which produces energy, and superconducting magnetic energy storage, which stores it.
At its center is the analysis of the magnetohydrodynamic equilibrium and stability of fusion plasmas.
On this foundation, the lab has expanded its research to tokamak design and control, magnetic field analysis, and applications to superconductivity.
The work is mainly theory and numerical analysis, but the lab also conducts experiments on tokamak plasmas and superconductivity.
Key terms
- Plasma
- A hot, gas-like state in which atoms are separated into nuclei and electrons
- Tokamak
- A device that confines plasma in a doughnut-shaped magnetic field to produce nuclear fusion
- Superconductivity
- A phenomenon in which electrical resistance drops to zero when a material is cooled below a certain temperature. It is used in coils that generate strong magnetic fields
NewsLab news
A master's student received the Excellence Award at the Nuclear Engineering Course's commendation for outstanding graduating students
The lab derived a variational problem that yields non-axisymmetric stable equilibrium solutions for fusion plasmas
A master's student received the Tokyo Tech Kakuyukai Master's Thesis Award
A master's student received the Tokyo Tech Student Leadership Award
Two doctoral students received Poster Prizes at AAPPS-DPP
ResearchResearch themes
The lab's research centers on analyzing the magnetohydrodynamic equilibrium and stability of fusion plasmas. Building on this, it has expanded to tokamak design and control, magnetic field analysis, and applications to superconductivity.
*Illustrative imageTokamak with High-Field Coils
A tokamak that uses coils optimized to produce a strong magnetic field, based on the virial theorem relating magnetic field and stress. Although the device is small, it has succeeded in generating a strong field exceeding 1 tesla.
*Illustrative imageOperation of Advanced Tokamaks
Using codes such as TSC (Tokamak Simulation Code), the lab studies control of advanced tokamaks and the avoidance of disruptions, in which the plasma is suddenly lost.
*Illustrative imageAlpha Particle Confinement Calculations
Whether alpha particles produced by fusion reactions can be confined in the reactor is an important issue in reactor design. Targeting the spherical tokamak, which is expected to make an economical reactor, the lab performs calculations with an orbit-following Monte Carlo code. This is joint research with the Naka Fusion Institute of the Japan Atomic Energy Agency.
*Illustrative imageAnalysis of Density Fluctuations Caused by Turbulence
The performance of magnetic confinement fusion devices is strongly affected by plasma turbulence. The lab acquires and analyzes large volumes of turbulence data measured on the Large Helical Device at the National Institute for Fusion Science, aiming to understand anomalous transport.
MembersFaculty
The members of Tsutsui Lab are faculty members and master's students.
- Associate ProfessorHiroaki TsutsuiPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Alcator C-Mod Tokamak Interior” Mike Garrett / CC BY 3.0 (cropped)
- Tokamak with High-Field Coils: “T-15MD Toroidal winding and poloidal field coils” Alexander Romannikov and Fusion research Centre team / CC BY 4.0 (cropped)
- Operation of Advanced Tokamaks: “MAST Tokamak ( )” Eye Steel Film / CC BY 2.0 (cropped)
- Alpha Particle Confinement Calculations: “NSTXU center stack insertion ( )” PPPL Princeton Plasma Physics Laboratory from Princeton, NJ, U.S.A. / CC BY 2.0 (cropped)
- Analysis of Density Fluctuations Caused by Turbulence: “LHD plasma vacuum vessel” National Institute for Fusion Science / CC BY-SA 4.0 (cropped)
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