냉동기에 의해 냉각되는 복사열차폐 최적설계

Design Optimization of Thermal Radiation Shield Cooled by Cryocooler

  • 최연석 (한국기초과학지원연구원, 물성과학연구부) ;
  • ;
  • 김동락 (한국기초과학지원연구원, 물성과학연구부) ;
  • 양형석 (한국기초과학지원연구원, 물성과학연구부) ;
  • 이병섭 (한국기초과학지원연구원, 물성과학연구부)
  • 발행 : 2008.11.05

초록

The design of thermal radiation shield cooled by a cryocooler is presented. This study is motivated mainly by our recent development of prototype superconducting magnet system for the Cyclotron K120. The superconducting magnet system is composed of the magnet cryostat, transfer line and supply cryostat. In order to minimize thermal radiation load, the superconducting coil form in the magnet cryostat is enclosed by the thermal radiation shield which is thermally connected to the first-stage cold head of a two-stage cryocooler in the supply cryostat. Since the supply cryostat is located far from the magnet cryostat large temperature gradient along the thermal shield is unavoidable. In this paper, the thermal radiation shield is optimized to minimize temperature gradient with taking into account the cryogenic load, system structure and electrical load. The effect of heat source from thermal conduction through mechanical supports on the temperature distribution of thermal radiation shield is also discussed.

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