The Application and Testing of the Helium Turbines in the EAST Cryogenic System

摘要

The helium cryogenic system supplies 4.5 K supercritical helium cooling for the superconducting magnets inrnthe EAST superconducting tokamak. Four helium turbines at low temperature are used in the 2 kW heliumrnrefrigeration system and their performance and reliability are very important for the continuouslyrnexperimental operation of EAST tokamak. Our need was to design, manufacture and test them. Somernanalysis,manufacture and design of the helium turbine structure, the helium turbine’s testing process andrnsome testing results are given.The starting up process and some operational experiences of the turbines arernalso present in this paper.