Modeling and Simulation of the CLS Cryogenic System

This paper presents results pertaining to the numerical modeling of the cryogenic system at the Canadian Light Source. The cryogenic system consists of the cryostat that houses a Radio Frequency (RF) Cavity used for boosting energy of an electron beam. For consistent operation of the RF Cavity, it must be kept immersed in liquid helium at a constant level with the pressure in the gas space maintained to an accuracy of ±1 mbar. The numerical method developed for solving the cryostat model [5] along with the liquid helium supply and gaseous helium return lines is validated using two different validation cases, viz., the liquid helium flow rate from the liquid helium transfer line and the gaseous helium flow rate from the cryostat for various heater power input settings. The numerical method described here is significantly more accurate and efficient than that used in [6].