Fundamental Thermal Analysis for Cryogenic System Design

Non-uniform temperature distribution, surface roughness, and superfluid helium level change between 2K dewar and cryomodule are most important thermal analyses in designing cryogenic system. Effective temperature for non-uniform temperature distribution is defined. Thermal radiation property from surface roughness is shown as a function of arbitrary dimension between 2-dimension and 3-dimension. Superfluid helium level change between 2K dewar and cryomodule is shown as a function of vapor pressure. Our research can be useful thermal analyses for cryogenic system design.