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Cryogenics v.89, 2018년, pp.113 - 118   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Deformation mechanism of the Cryostat in the CADS Injector II

Yuan, Jiandong (Corresponding author. ) ; Zhang, Bin ; Wan, Yuqin ; Sun, Guozhen ; Bai, Feng ; Zhang, Juihui ; He, Yuan ;
  • 초록  

    Abstract Thermal contraction and expansion of the Cryostat will affect its reliability and stability. To optimize and upgrade the Cryostat, we analyzed the heat transfer in a cryo-vacuum environment from the theoretical point first. The simulation of cryo-vacuum deformation based on a finite element method was implemented respectively. The completed measurement based on a Laser Tracker and a Micro Alignment Telescope was conducted to verify its correctness. The monitored deformations were consistent with the simulated ones. After the predictable deformations in vertical direction have been compensated, the superconducting solenoids and Half Wave Resonator cavities approached the ideal “zero” position under liquid helium conditions. These guaranteed the success of 25 MeV@170 uA continuous wave protons of Chinese accelerator driven subcritical system Injector II. By correlating the vacuum and cryo-deformation, we have demonstrated that the complete deformation was the superposition effect of the atmospheric pressure, gravity and thermal stress during both the process of cooling down and warming up. The results will benefit to an optimization for future Cryostat’s design. Highlights We have investigated the mechanism of vacuum deformation of the chamber. We examined the effect of the expansion with heat and contraction with cold on the cold mass inside of the vacuum chamber. We computed the precise Pre-compensated quantity and verify its correctness by the monitored data.


  • 주제어

    Cryostat .   Deformation .   Laser tracker .   Micro alignment telescope .   Superconducting solenoid .   Half wave resonator cavity.  

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