A new method based on the principle of magnetic circuits is proposed and realized for continuousIcexamination of HTS tapes. The greatest advantages of the new method are that it first eliminates all the noise caused by mechanical fluctuations, and thus makes high speed and high stability measurement possible, and second has a natural ability to measure HTS tape with a magnetic 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 continuousIcexamination for a YBa2Cu3O7-xtape with and without a magnetic substrate and a Bi2Si2Ca2Cu3Oxmulti-filamentary tape is reported.
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Gu et al. (2010) studied this question.