Development of Wind-and-React Bi-2212 Accelerator Magnet Technology

摘要

We report on the progress in our Ru00026;D program, targeted to develop the technology for the application of ${rm Bi}_{2}{rm Sr}_{2}{rm CaCu}_{2}{rm O}_{x}$ (Bi-2212) in accelerator magnets. The program uses subscale coils, wound from insulated cables, to study suitable materials, heat treatment homogeneity, stability, and effects of magnetic field and thermal and electro-magnetic loads. We have addressed material and reaction related issues and report on the fabrication, heat treatment, and analysis of subscale Bi-2212 coils. Such coils can carry a current on the order of 5000 A and generate, in various support structures, magnetic fields from 2.6 to 9.9 T. Successful coils are therefore targeted towards a hybrid ${rm Nb}_{3}{rm Sn}$ –HTS magnet which will demonstrate the feasibility of Bi-2212 for accelerator magnets, and open a new magnetic field realm, beyond what is achievable with ${rm Nb}_{3}{rm Sn}$ .