Speaker
Mr
jiandong yuan
(Institute of Modern Physics , Chinese Academy of Sciences)
Description
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.
Primary author
Mr
jiandong yuan
(Institute of Modern Physics , Chinese Academy of Sciences)
Co-authors
Mr
Guozhen Sun
(institute of modern physics,chinese academy of science)
Mr
bin zhang
(impcas)