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Plasma Physics and Engineering Lab
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The lab confines plasma with magnetic fields and works toward the realization of nuclear fusion.
AboutAbout the lab
Taking on the challenge of realizing a "sun on Earth"
The Plasma Physics and Engineering Lab studies fusion plasma using the GAMMA 10/PDX tandem mirror device at the Plasma Research Center, University of Tsukuba.
One of the major challenges in realizing a fusion reactor is making a plasma at 100 million degrees compatible with the room-temperature wall surrounding it.
At the center, the lab works on controlling the edge plasma between the core and the wall, and on developing the gyrotron, a high-power microwave oscillator tube.
GAMMA 10/PDX is 27 m long and is the world's largest tandem mirror plasma confinement device.
Key terms
- Plasma
- A state in which atomic nuclei and electrons move freely. In nuclear fusion, the fuel particles are kept in this state
- Tandem mirror
- A type of device that confines plasma with mirror magnetic fields. GAMMA 10/PDX is the world's largest, at 27 m long
- Divertor plates
- The plates that receive the highest heat load among the first wall components of a fusion reactor
- Gyrotron
- An oscillator tube that generates high-power millimeter-wave microwaves. It is expected to serve as a tool for purposes such as electron heating
NewsLab news
View More ↗ResearchResearch themes
The Plasma Research Center takes as its basic principle contributing to the solution of energy problems and global warming. It tackles the challenge of making a fusion plasma at 100 million degrees compatible with the room-temperature wall surrounding it. Using GAMMA 10/PDX, the center works on improving plasma confinement and controlling edge plasma, and also on developing devices such as gyrotrons.
*Illustrative imageImproving plasma transport and confinement
The lab studies the control of plasma transport, extending from the core plasma to the edge region. It improves confinement using electric potentials and electric fields, and contributes to making this compatible with reducing the heat and particle loads on the divertor plates.
*Illustrative imageResearch on edge plasma
To greatly reduce the heat load on the divertor plates, the lab studies the physics and control of edge plasma and the interaction between plasma and the wall. Making use of the characteristics of an open magnetic field, it aims to make a plasma of several hundred million degrees compatible with a room-temperature wall.
*Illustrative imagePlasma heating and gyrotron development
Using ion cyclotron resonance heating, the lab has achieved an ion temperature of 100 million degrees near the center of the central cell. It is also developing the gyrotron, a high-power microwave oscillator tube expected to serve as a tool for purposes such as electron heating.
MembersFaculty
The members of the Plasma Research Center consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorNaomichi Ezumi
- Assistant ProfessorSatoshi Togo
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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: “Compact Toroidal Hybrid at Auburn University” GJHartwell / CC BY-SA 4.0 (cropped)
- Improving plasma transport and confinement: “A SPARC of Fusion Energy ( )” Steve Jurvetson from Los Altos, USA / CC BY 2.0 (cropped)
- Research on edge plasma: “Alcator C-Mod Tokamak Interior” Mike Garrett / CC BY 3.0 (cropped)
- Plasma heating and gyrotron development: “High-voltage cage for the gyrotron heating system of Wendelstein 7-X” Siarhei Besarab / CC BY-SA 4.0 (cropped)
- Related lab (原子分子光理論研究室): “Laser with amplifier” Tourbillon / CC BY-SA 3.0 (cropped)
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光学): “Lab based Soft X-ray Microscope- SiriusXT” Ananya Vatsa / CC BY-SA 4.0 (cropped) - Related lab (電子スピン共鳴分光): “Electron spin resonance spectroscopy” Bill Branson (Photographer) / Public domain (cropped)
- Related lab (固体量子物性研究室): “Progress of sapphire single crystal growth - DPLA - d199bf6a077c3bb4dbc2d06d6ae3ba76” Watertown Arsenal (Mass.); U.S. Army Materials and Mechanics Research Center. Public Affairs Office / Public domain (cropped)
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