Experimental design of the cryogenic system for superconducting Wiggler magnet
The 6 T superconducting Wiggler magnet's cryogenic system in the Hefei National Synchrotron Radiation Labora-tory introduced three 4.2 K GM cryocoolers as the cold sources to produce liquid helium by enriching the liquefied helium gas,so as to realize the zero evaporation rate of liquid helium in the cryogenic system.Through optimized design,the heat load of the cryogenic system is less than the cooling capacity provided by three 4.2 K GM cryocoolers.ANSYS simulation software was used to analyze the temperature field of the cryogenic system through simulation,and the temperature simulation results of key compo-nents such as the beam tube and high-temperature superconducting current leads meet the requirements of system operation.Af-ter the assembly of the cryogenic system,the cooling and helium liquefaction experiments of the cryogenic system were carried out.After the cooling experiment of 62 hours,the superconducting Wiggler magnet was cooled to 4.2 K,and the helium lique-faction rate of the cryogenic system could reach 12 L/day.The above experimental results confirmed that the developed cryogenic system can meet the requirements for stable operation of the superconducting Wiggler magnet cryogenic system.
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