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Particle Beam Materials Engineering Lab
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A lab that elucidates the damage that high-energy particles leave in materials.
AboutAbout the lab
Seeing what particle beams leave in materials.
The Particle Beam Materials Engineering Lab studies the phenomena caused when materials are irradiated with radiation or particle beams.
In terms of the interaction between atoms in a solid and particle beams, it is a problem of physics; in terms of developing nuclear reactor materials and aerospace materials, it is a problem of engineering.
In particular, the lab aims to carry out fundamental research on defects created inside materials by irradiation, and to develop materials by applying that knowledge.
Its home base is the Institute for Integrated Radiation and Nuclear Science in Kumatori, Osaka, where experiments are carried out using facilities such as the Kyoto University Research Reactor (KUR).
Key terms
- Irradiation effects
- Phenomena caused when a material is exposed to radiation or particle beams
- Positron annihilation spectroscopy
- A method that probes atomic-scale voids using the signals emitted when positrons annihilate inside a material
- Point defect
- A disturbance about the size of a single atom in a crystal, formed when an atom goes missing or an extra atom is squeezed into a gap. Large numbers of them are created in irradiated materials
NewsLab news
Associate Professor Qiu Xu received a Highly Cited Paper award from Clarivate (Web of Science)
Associate Professor Qiu Xu received a Highly Cited Paper award from Clarivate (Web of Science)
ResearchResearch themes
To elucidate irradiation effects in solid materials, mainly metals and semiconductors, the lab develops and maintains various irradiation facilities using neutrons, ions, and electrons, studies evaluation methods based on positron annihilation spectroscopy and electron microscopy, and runs computer simulations that resolve the reaction processes of defects produced by irradiation.
Tracing defects created by irradiation
The lab investigates how point defects produced by irradiation grow into secondary defects. It carries out material irradiation in the research reactor KUR and evaluation using slow positron beams.
*Illustrative imageHow nuclear materials degrade
Degradation of nuclear materials caused by neutron irradiation bears on reactor safety. The research focuses on accurately predicting changes in material properties and developing materials that resist irradiation.
MembersFaculty
The members of the Particle Beam Materials Engineering Lab consist of faculty and master's students in the Department of Mechanical Engineering and Science, Graduate School of Engineering.As of 2025
- ProfessorAtsushi Kinomura
- Associate ProfessorQiu Xu
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: “Later stage of the CLARA Accelerator, Daresbury Laboratory” Mystery Ray / CC0 (cropped)
- How nuclear materials degrade: “Old RPV” Nuclear Regulatory Commission / Public domain (cropped)
- Related lab (Neutron Engineering Lab): “Fields and neutron source - geograph.org.uk - 5301501” Rudi Winter / CC BY-SA 2.0 (cropped)
- Related lab (Propulsion Engineering Lab): “Xenon hall thruster” Jet Propulsion Laboratory / Public domain (cropped)
- Related lab (Mathematical Life Sciences Lab): “Shorea robusta leaf pattern” Subhashish Panigrahi / CC BY-SA 4.0 (cropped)
- Related lab (Particle Beam Medical Physics Lab): “Cyclotron patent” Ernest O. Lawrence / Public domain (cropped)
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