ENERGY LOSSES IN COOLING OF CRYOGENIC CURRENT LEADS.

The goal of this study is to analyze the cooling system with regard to energy expenditure in the cryogenic device for self-regulating and forced cooling of current leads. The authors study the behavior of the function omega equals w/I(T//c) for self-regulated cooling of current leads, wherein a segment with temperature in the interval (T//0, T//c) is cooled by a flow rate G, while the remainder with temperature in the interval (T//c, T//l) is cooled by a flow rate G-G//p, where G//p equals KG. Results of calculations of specific energy losses for self-regulating cooling of the current loads are presented. They indicate that at G//p equals G minimal and practically constant energy losses are realized at T//c equals (240-300) K. With decrease in the value of G//p the difference between the maximum and minimum values of omega decreases. The maximum is not clearly expressed, but corresponds to T//c approximately equals 30 K.