Speaker
Lijun Cai
(Southwestern Institute of Physics)
Description
A medium sized Tokamak HL-2M is being designed and constructed in Southwestern Institute of Physics of China. This device can be operated with high plasma current 2.5 MA and toroidal magnetic field 3 T. Advanced divertor configurations with snowflake, tripod etc. are envisaged to study the divertor physics under high heating power and high core plasma performance operation. To accommodate the various advanced divertor configurations, a robust and flexible engineering design of divertor is expected.
In this paper the design and analysis progress of HL-2M divertor has been introduced. The divertor assembly is divided into 80 modules to facilitate the installation, maintenance, and local upgrade. Each module is mainly composed of CFC tiles, tile carriers, support box beam, and cooling pipes, and these components are integrated by the support beam via hinge/bolt joints allowing thermal expansion and tolerating clearances. CFC tiles as the plasma facing material are brazed on the tile carriers which are drilled inside with channels to feed cooling water during plasma discharge and hot nitrogen during 300C baking. These channels are connected to water pipes embedded inside the curved box beam to minimize the risk of plasma bombardment. High precision support ring and flexible connection with vacuum vessel are designed to install the divertor assembly precisely. Two-phase thermal hydraulic analysis has been done to research the cooling performance, and structural integrity analyses have also been done based the thermal gradients and electromagnetic loads. The results show that HL-2M advanced divertor can survive under 10MW/m22 cyclic operation and satisfy the requirements from physicists.
Co-authors
Guoyao Zheng
(Southwestern Institute of Physics, Chengdu, China)
Jian Liu
(Southwestern Institute of Physics, Chengdu, China)
Lijun Cai
(Southwestern Institute of Physics, Chengdu, China)
Tao Lin
(Southwestern Institute of Physics, Chengdu, China)
Xiang Liu
(Southwestern Institute of Physics, Chengdu, China)
Yinglong Yuan
(Southwestern Institute of Physics, Chengdu, China)
Yong Lu
(Southwestern Institute of Physics, Chengdu, China)
Yuxiang Liu
(Southwestern Institute of Physics, Chengdu, China)
