MethodandApparatusforContinuous Examination of HTS Tape Using Magnetic Circuit Chen Gu, Timing Qu, Shengnan Zou, and Zhenghe Han

A new method based on the principle of magnetic cir- cuits is proposed and realized for continuous examination of HTS tapes. The greatest advantages of the new method are that it first eliminates all the noise caused by mechanicalfluctuations, and thus makes high speed and high stability measurement possible, and second has a natural ability to measure HTS tape with a mag- netic substrate. The principle of the method is introduced with the help of Finite Element Analysis. An apparatus for examination of kilometer long tapes has been constructed, by which continuous examination for a tape with and without a mag- netic substrate and a multi-filamentary tape is reported.