【摘要】 HT- 7U超导模型线圈实验中 ,研究了国产金属箔式应变片在低温和强磁场下的工作特性 ;测量了应变片从室温液氮温度液氦温度的输出示应变曲线 ,以及磁场强度从 0 T- 4T时应变片的输出示应变曲线。实验测得 ,对所选用的应变片 ,从室温降至液氮温度 (77.4K)的热输出为 - 3 6 4 7με,降至液氦温度 (4.2 K)的热输出为 - 3 999με,磁场从 0 T升至 4T的输出示应变为2 3 5με。更多还原

【Abstract】 During the experiment of the HT-7U superconducting model coil, we have studied the home-made metal-foil strain gauges for cryogenic application in magnetic fields. We have measured the apparent-strain curve of the tested gauge from room temperature to liquid nitrogen temperature and liquid helium temperature, as well as the apparent-strain curve when magnetic intensity varies from 0 to 4T. The test results show, for the selected strain gauge, the apparent-strain is -3647με at liquid nitrogen temperature, -3999με at liquid helium temperature, 235με at 4T.更多还原