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Plasma Wave Science and Engineering Lab
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A lab that experimentally explores waves and fluctuations in fusion plasma.
AboutAbout the lab
Taking on fusion plasma with waves and RF
The Plasma Wave Science and Engineering Lab focuses on waves and fluctuations in fusion plasma and studies their properties and control.
Combining experiments, measurements, and simulations, the lab investigates instabilities that occur in high-temperature plasma and interactions between waves and particles.
The lab also works on reducing heat and particle loads on the divertor with RF (electromagnetic waves), and on the motion of high-energy electrons.
Research is carried out at the spherical tokamak device QUEST on the Chikushi Campus.
On the lab's website, it is introduced together with the Steady-State Plasma Heating Lab (Prof. Idei) under the name "Idei-Ikezoe Lab."
Key terms
- Spherical tokamak
- One method of confining high-temperature plasma with a magnetic field. QUEST is the largest spherical tokamak device in Japan.
- Divertor
- The part of a magnetic confinement fusion reactor that receives heat and particle loads. Reducing this load is regarded as the biggest bottleneck.
- RF plugging
- The idea of reducing heat and particle loads on the divertor using radio frequency (RF) (RF plugged divertor).
ResearchResearch themes
The Plasma Wave Science and Engineering Lab conducts research in fusion and plasma science centered on plasma wave physics and RF (electromagnetic wave) technology. Focusing on waves and fluctuations, it deals with plasma phenomena and devices across a wide range of frequencies.
*Illustrative imageCharacterizing Strongly Electron-Heated Plasmas
The lab studies the characteristics of spherical tokamak plasmas in which electrons are strongly heated. It evaluates magnetohydrodynamic instabilities, burst phenomena, and magnetic fluctuations, as well as edge electromagnetic turbulence and divertor heat flux, using tools such as fast-scanning probes.
*Illustrative imagePhase-Space Physics of High-Energy Electrons
The lab investigates how high-energy electrons move in phase space, using oblique electron cyclotron emission, hard X-ray measurements, and MHz-band wave measurements. Interactions between particles and waves such as whistler waves are also studied.
*Illustrative imagePlasma Control Using Radio Frequency
The lab studies plasma control using radio frequency (RF). In addition to aiming to reduce heat and particle loads on the divertor through RF plugging, it works on ion heating using difference-frequency heating and nonlinear coupling.
MembersFaculty
The members of the Idei-Ikezoe Lab consist of faculty, doctoral, master's, and undergraduate students, and administrative staff.As of 2026
- Associate ProfessorRyuya Ikezoe
- ProfessorHiroshi Idei
VoicesStudent voices
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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: “NASA magnetosphere plasma waves diagram” Credits: NASA’s Goddard Space Flight Center/Mary Pat Hrybyk-Keith / Public domain (cropped)
- Characterizing Strongly Electron-Heated Plasmas: “Glow discharge regions” Derived file: Chetvorno Original file: Jannis Andrija Schnitzer / CC BY-SA 2.0 (cropped)
- Phase-Space Physics of High-Energy Electrons: “Aurora and perseids” Stephan Sprinz / CC BY 4.0 (cropped)
- Plasma Control Using Radio Frequency: “Canare, Coaxial cable, L-5CFB, Blue” Ohgud.kibn7ewyu2 / CC BY-SA 4.0 (cropped)
- Related lab (Steady-State Plasma Heating Lab): “MAST side view ( )” Andy Busse / CC BY-SA 2.0 (cropped)
- Related lab (Steady-State Plasma Science and Engineering Lab): “Demo stv” Patron974 / CC BY-SA 4.0 (cropped)
- Related lab (Boundary Plasma Experiment and Analysis Lab): “MSNW Fusion Rocket Prototype” Alan Boyle, GeekWire and MSNW Inc (now defunct). / CC BY-SA 4.0 (cropped)
- Related lab (Steady-State Plasma Control Lab): “MAST bottom view ( )” Andy Busse / CC BY-SA 2.0 (cropped)
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