We proposed a new reinforcing technique against a huge electromagnetic hoop stress for HTS pancake coils in a high magnetic field with improving their strain tolerance. Two react and wind type Bi-2212 test pancake coils were prepared; one was a standard coil and another was a compressively pre-strained coil. Their mechanical and transport current properties were investigated in liquid Helium (T = 4.2 K) and a magnetic field of 10 T. The mechanical properties of the two were almost the same, however, the pre-strained coil could transport current without any degradation up to a strain of 0.3% though a significant degradation occurred at >0.18% for the standard coil.
- High field HTS magnet
- Hoop strain
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering