CFETR偏滤器概念设计

Conceptual Design of Divertor in CFETR

偏滤器是托卡马克装置——中国聚变工程实验堆(China Fusion Engineering Test Reactor,CFETR)的核心部件之一,是高温等离子体与材料直接接触的过渡区域。本文在满足CFETR总体设计要求和设计依据的前提下,针对不同的等离子体位型(类ITER和雪花等离子体位型),设计了同一盒体支撑的3种偏滤器结构,即类ITER偏滤器、雪花偏滤器和类ITER-雪花偏滤器,并对类ITER偏滤器结构进行了详细设计,包括第一壁设计、两侧支撑轨道设计、冷却系统设计和抽气系统设计。通过计算磁力线膨胀系数,验证了3种偏滤器结构设计的合理性,为偏滤器结构进一步优化和改进提供了必要的理论依据。

China Fusion Engineering Test Reactor （CFETR） is a superconducting Tokamak which is designed by China National Integration Design Group for magnetic confinement fusion. Divertor, as transitional zone between the high temperature plasma and materials, is very critical for fusion reactor operation. Under the condition of meeting overall design requirements and design basis in CFETR, three divertors to the same cassette were designed as follows： ITER-like divertor, Snowflake divertor and ITERlike- Snowflake divertor. Additionally, structural design of ITER-like divertor in detail was carried out, including first-wall design, rail-RH design, cooling system design, and pumping system design. Finally, flux expansion was calculated to verify the rationality of various divertors. It can provide the necessary theoretical basis for the further optimization and improvement of divertors in the future application.