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中文摘要：
连接超导装置和外部电源的电流引线,是制冷系统的主要漏热源,决定着超导装置的运行效率。为实现漏热的最小化,对珀尔贴电流引线（Peltier current lead,简称PCL）进行了传热分析;引入热电参数的温度特性,建立了PCL的二维模型;采用有限元法对传导冷却下的PCL进行漏热分析与结构优化,得到了电流引线的最优几何参数。分析发现引线室温端的漏热大约为低温端的2倍;忽略热电参数的温度特性将使几何参数偏离最佳值,造成额外的制冷负荷。
英文摘要：
Current leads,a connecting superconducting devices at cryogenic temperature with power source at room temperature,are the major heat leak source during operation,determining the operating efficiency of superconducting devices. With considering its thermoelectric property,a two-dimensional model of the conduction-cooled Peltier current lead（ PCL） was established and optimized in order to achieve the minimum heat leakage by using finite-element simulation. The results showed that room-temperature heat leakage was about double of low-temperature one at ends of current leads; the geometric parameters would deviate from the optimal value if temperature characteristics of thermoelectric parameters were ignored,which led to extra cooling load.
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