The acoustic emission (AE) technique is suitable for detecting the presence of thermal and mechanical stress in superconductors, which have adverse effects on the stability of their application systems. However, the detection of AE signals from a HTS tape in a bath of liquid cryogen (such as liquid nitrogen, LN2) has not been reported because of its low signal to noise ratio due to the noise from the boiling liquid cryogen. In order to obtain the AE signals from the HTS tapes during quenching, this study carried out repetitive quench tests for YBCO coated conductor (CC) tapes in a cooling system using solid nitrogen (SN2). This paper examined the performance of the AE sensor in terms of the amplitudes of the AE signals in the SN2 cooling system. Crown
Bibliographical noteFunding Information:
This study was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MEST 2009-0085369 ) and in part by the Electric Power Industry Technology Evaluation and Planning. It was also supported by a grant from the center for Applied Superconductivity Technology of the 21st Century Frontier R&D Program funded by the Ministry of Education, Science and Technology, Korea.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering