关键词: HL-2M 装置；第一壁；传热结构 

Abstract: In the design of thermal transfer structure of first wall on HL-2M tokamak, the heat loads on first 
wall surface facing plasma are transferred rapidly to the vacuum vessel wall by using the characteristic of fast heat 
transfer in direction of the heat pipe axis. As the cold-heat connection ends, the heat sink is welded respectively on 
the backboard of first wall and vacuum vessel wall, while the heat pipe is embedded into the heat sink. The metal 
foil is inserted into the gap between the pipe and the sink for heat transfer enhancement, and is fixed by a keep 
plate to enhance the heat transfer of the contacting interface. A testing prototype according to the heat transfer 
structure design is manufactured. The performance of prototype of heat transfer structure is tested. It shows that 
the maximum heat transfer power is 4kW and the maximum equivalent convective heat transfer coefficient is 
6kW·m^‒2 between the cold end and heat end of the prototype under the experimental and theoretical extrapolation 
conditions. 

Key words: HL-2M tokamak, First wall, Thermal transfer structure