Modeling the cooldown of force cooled coils

This paper describes a finite difference computer program which simulates then cooldown of force-cooled superconducting coils. The basic theory is discussed and the method of calculation used in the program is described. Some of the problems associated with computer modeling of a cooldown are discussed. The program capability is demonstrated on a three dimensional model which represents the 1000 kg cryogenic model of the euratom LCT coil. From computer simulation using the program described here, a method for cooling down large forced cooled superconducting coils can be developed.