We theoretically investigated adequate geometrical configuration of a saddle-shaped pickup coil for accurate measurement of the AC losses in oxide superconducting taped wires with large anisotropy. Defining the ratio of the apparent signal due to the magnetic moment in sample wires, which is detected by a saddle-shaped pickup coil, to the actual one as a detection ratio, we calculated the dependences of the detection ratio on the height, width and length of the straight and opening parts of a saddle-shaped pickup coil. We found out that it is possible to obtain the actual magnetization without compensation by supposing that the effective length of sample wires is equal to that of the straight part of a saddle-shaped pickup coil. Here we should consider that the signal detected by the opening part compensates for the shortage of the signal detected by straight part. Finally the recommendable dimensions of the saddle-shaped pickup coil were given for the measurement of the AC losses in currently developed oxide superconducting wires.
|ジャーナル||Research Reports on Information Science and Electrical Engineering of Kyushu University|
|出版ステータス||出版済み - 3 2003|
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Hardware and Architecture
- Engineering (miscellaneous)