Overview

CDPS (Compact Divertor Plasma Simulator) was developed by collaborative research between Nagoya University, Tohoku University, and National Institute for Fusion Science. This device is located on Oarai city in Ibaraki Prefecture.

When a neutron generated by a nuclear fusion reaction collides with the wall material, it creates scratches (defects) in the material. It is difficult to control the fuel particle balance inside the vacuum vessel because it is easy for hydrogen isotope gases as fuel to enter this defect, so it is important to investigate the influence of neutron defects. However, since neutron irradiated materials are activated, they can not be handled unless they are within the radiation controlled area. Therefore, we brought the small plasma device manufactured by the know-how cultivated in the Ohno laboratory into the controlled area and began operation around 2016.

CDPS is connected with a Thermal Desorption Spectrometry (TDS), and gas analysis immediately after plasma irradiation is possible. There are few laboratory equipment with these environments in the world, and it is part of the forefront of the fusion research.

Main research topics

• Plasma and neutron irradiated material interaction
• Deuterium absorption in neutron irradiated tungsten specimen

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