Demountable Toroidal Field Magnets for Use in a Compact Modular Fusion Reactor

[摘要] A concept of demountable toroidal field magnets for a compact fusion reactor is discussed. The magnets generate a magnetic field of 9.2 T on axis, in a 3.3 m major radius tokamak. Subcooled YBCO conductors have a critical current density adequate to provide this large magnetic field, while operating at 20 K reduces thermodynamic cooling cost of the resistive electrical joints. Demountable magnets allow for vertical replacement and maintenance of internal components, potentially reducing cost and time of maintenance when compared to traditional sector maintenance. Preliminary measurements of contact resistance of a demountable YBCO electrical joint between are presented.

[发布机构] Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge; MA; 02139, United States^1

[关键词] Cooling costs;Demountable toroidal field magnets;Electrical joints;Measurements of;On-axis;Reducing costs;Subcooled;YBCO conductors