Database of development of the iron-based superconducting coils for high magnetic field application

IBS is brittle after heat treatment, and little mechanical damage may reduce the performance of thetapes and coils. We developed a type of IBS coil with single or double pancake, which exhibits little performancereduction after some technological improvements.some defects in the coils have been discovered during testing, and we come up with some technological improvements accordingly, the performance of new coils is greatly improved.