THERMAL ANALYSIS AND ENGINEERING DESIGN FOR LIQUID HELIUM DEWAR OF NBI CRYOCONDENSATION PUMP

It is a key issue to decrease the LHe consumption rate of cryocondensation pump of NBI.Thermal analysis for LHe Dewar was made.The main parameters that affect the LHe consumption rate of the Dewar were obtained.The measures on how to decrease the LHe consumption rate were discussed.Several useful inner structure-types for large LHe Dewar of NBI cryocondensation pump were suggested.