HL-LHC双孔径校正超导磁体低温测试实验研究  

Study on low temperature test of HL-LHC twin aperture correction superconducting magnet

作　　者：王朋元 王旭东[2] 吴巍[2] 郑敏[1] 欧贤金 杨颜冰 倪东升[2] 秦祥琦 王力实 乔威宇 Wang Pengyuan;Wang Xudong;Wu Wei;Zheng Min;Ou Xianjin;Yang Yanbing;Ni Dongsheng;Qin Xiangqi;Wang Lishi;Qiao Weiyu(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;The University of the Chinese Academy of Sciences,Beijing 100049,China;Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]中国科学院近代物理研究所,兰州730000 [3]中国科学院大学,北京100049 [4]兰州大学,兰州730000

出　　处：《低温与超导》2022年第3期24-30,共7页Cryogenics and Superconductivity

基　　金：中国科学院战略先导B项(Y815010XD1)资助。

摘　　要：双孔径校正超导磁体是大型强子对撞机亮度升级项目的重要组成部分,在4.2 K低温环境下对该磁体进行励磁及性能测试。为避免磁体在降温过程中产生较大的热应力,要求降温过程中磁体各点最大温差不超过30 K。同时,为节省液氦与降温梯度均匀,特设计了一个铜筒体结构用于该磁体的降温和测试,降温过程分为液氮换热降温和液氦直冷降温两个阶段。实验测试结果表明静态液氦消耗速率为55.571 L/h,电流为407 A失超时液氦总消耗52 L、静态消耗16.116 L、内部泄能消耗22.08 L,即液氦消耗不仅包括测试系统的静态消耗、泄能消耗,还存在液氦溢出损耗。The twin aperture correction superconducting magnets are an important part of HL-LHC(High-Luminosity Large Hadron Collider)upgrade project,with excitation and performance tested at 4.2 K.In order to avoid the large thermal stress in the cooling process,the maximum temperature difference between the magnet points in the cooling process should not exceed 30 K.At the same time,to save LHe(liquid helium)and even cooling gradient,a copper cylinder structure was designed for the cooling and testing of this magnet,the cooling process was divided into two stages:LN;(liquid nitrogen)heat exchange cooling and LHe direct cooling.The experimental results show that the static LHe consumption rate is 55.571 L/h,the current is 407 A,the total LHe consumption is 52 L,the static consumption is 16.116 L and the internal leakage energy consumption is 22.08 L,that is,the LHe consumption not only includes the static consumption and leakage energy consumption of the test system,but also has the LHe overflow loss.

关 键 词：双孔径校正超导磁体 低温垂测系统 降温 液氦消耗 

分 类 号：TB65[一般工业技术—制冷工程]