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为确保STEP卫星超高精度加速度计的测量头线圈三维超导膜在设计的工作电流范围内完全超导,以实现10-18g精度的加速度测量,对测量头线圈进行了低温超导测试,测试证明三维超导膜存在不完全超导缺陷。利用分段测试法对三维膜线圈的二维组成部分进行了测试,确定了测量头线圈超导缺陷的位置,并分析了造成超导缺陷的原因。根据测试和分析结果改进了线圈设计,实现了测量头线圈的完全超导,并标定线圈的最大工作电流为-40～40mA,满足STEP卫星加速度计对超导电流要求的-10～10mA,设计裕度达到300%。通过测试、分析与改进设计,定型了STEP卫星超高精度加速度计测量头线圈的研制,为完成STEP任务奠定了技术基础。同时,实现了三维超导膜线圈的制造与工程应用。
To ensure that the STEP satellite ultra-high precision accelerometer measuring head coil three-dimensional superconducting film in the design of the operating current range of fully superconducting, in order to achieve 10-18g accuracy of acceleration measurement of the coil on the probe low-temperature superconducting test, test Proved three-dimensional superconducting film there is incomplete superconducting defects. The two-dimensional components of the three-dimensional film coil were tested by the piecewise test method to determine the position of the superconducting defect in the measuring head coil and the reason of the superconducting defect was analyzed. Based on the testing and analysis results, the coil design is improved and the complete superconducting of the measuring head coil is realized. The maximum operating current of the calibrating coil is -40 ~ 40mA, which meets the requirement of -10 ~ 10mA for the superconducting current of STEP satellite accelerometer. Margin up to 300%. Through the testing, analysis and improvement of design, the development of the measuring head coil of the STEP satellite ultrahigh precision accelerometer was established, which laid the technical foundation for completing the STEP task. At the same time, the manufacture and engineering application of three-dimensional superconducting film coils are realized.