P. Dauguet, P. Briend, I. Abe, E. Fauve, Jean Bernhardt, F. Andrieu, J. Beauvisage
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DESIGN AND MANUFACTURING OF THE KSTAR TOKAMAK HELIUM REFRIGERATION SYSTEM
The KSTAR (Korean Superconducting Tokamak Advanced Research) project makes intensive use of superconducting (SC) magnets operated at 4.4 K. The cold components of KSTAR require a forced flow of supercritical helium for magnets and structure, boiling liquid helium for current leads, and gaseous helium for thermal shields. A helium refrigeration system has been custom-designed for this project. The purpose of this paper is to give a brief overview of the proposed cryogenic system. The specified thermal loads for the different operating modes are presented. This specification results in the definition of a design mode for the refrigerator. The design and construction of the resulting 9 kW at 4.5-K Helium Refrigeration System (HSR) are presented.
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