Thermo-structural analysis of SST-1 cryopump

•Design consideration of SST-1 cryopump.•Pumping speed estimation of cryopump for different gases.•Different types of heat load and their estimation.•Thermal analysis of cryopanels, shield and baffle.•Thermo-structural analysis of cryopanels and shield-baffle assembly. A liquid nitrogen-based cryopu...

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Bibliographic Details
Published in:Cryogenics (Guildford) 2020-09, Vol.110, p.103132, Article 103132
Main Authors: Gupta, Vishal, Tanna, Vipul L., Gangradey, Ranjana, Mukherjee, Samiran Shanti, Shankar Mishra, Jyoti, Panchal, Paresh, Nayak, Pratik A.
Format: Article
Language:English
Subjects:
Baking
Cryopumping
Failure analysis
Liquid nitrogen
Molecular pumps
Pumping
Sorbents
Stress concentration
Structural analysis
Surface roughness
Temperature distribution
Thermal analysis
Thermal conductivity
Thermal stress
Vacuum chambers
Vessels
Water vapor
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Summary:•Design consideration of SST-1 cryopump.•Pumping speed estimation of cryopump for different gases.•Different types of heat load and their estimation.•Thermal analysis of cryopanels, shield and baffle.•Thermo-structural analysis of cryopanels and shield-baffle assembly. A liquid nitrogen-based cryopump for Steady State Superconducting Tokamak (SST-1) is designed for pumping of water vapour from vacuum vessel during baking and under heavy gas load conditions. During baking, the load of the water vapour molecules increases while the resultant speed of available Turbo-Molecular Pumps is less for water vapour which increases the pressure of the vacuum vessel. Cryopump with the same opening area as of TMPs has more pumping speed for water vapour molecules. Hence, the said cryopump will pump water vapour molecules with higher pumping speed. In principle, water vapour molecules get condensed at a surface temperature of
ISSN:0011-2275
1879-2235
DOI:10.1016/j.cryogenics.2020.103132