Speaker
Description
HL-2M is a medium-sized copper-conductor tokamak under construction at the Southwestern Institute of Physics (SWIP). The designed plasma parameters are as follows, plasma current=3 MA, toroidal field = 3 T, major radius =1.78 m, minor radius = 0.65 m, flux-swing > 14 Vs, plasma pulse ~ 5 s, with a plasma shape of elongation = 2 and triagularity > 0.5. The demountable toroidal field coils structure has been selected in order to removal of the vacuum vessel and poloidal coils integrally. The toroidal field coil is designed for a maximum field of 3 T at R = 1.78 m and consists of 140 turns (20 bundles, each bundle 7 turns) with a maximum current of 191 kA. Under normal operation condition, the current is 140 kA and the field is 2.2 T. Each turn is composed of inner, upper and outer arc part which are connected by finger joint and bolted joint. The report introduces the structure of toroidal field coils, selection and fabrication process of conductor materials for toroidal field coils, the parameters of conductor materials such as the hardness, electrical conductivity, yield strength, tensile strength, and fatigue strength firstly. Then introduce fabrication technology for toroidal field coils, such as welding cooling water pipe technique, turn to turn insulation technique, prestressed epoxy-glass cylinder technology.
| Eligible for student paper award? | No |
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