AMTEX Program on JFT-2M
(Advanced Material Tokamak Experiment)
AMTEX is planned for the development of reactor material as well as toroidal field ripple reduction of ITER.
1. Ripple reduction test
Guideline for reduction of α particle loss in ITER|
|for negative shear,|
|Reduce the ripple by inserting ferritic steel|
2. Plasma-material test
Reactor structural material|
Low activation ferritic steel is promising. However, its magnetism is worried about because of the error field.
|Replace material of the JFT-2M vacuum vessel with ferritic steel
Issues of Ferritic Vacuum Vessel
Disruption by mode lock due to error field
Reduction of toroidal field ripple
Compatibility with improved confinement, etc.