Speaker
Description
A key focus of the US Magnet Development Program (USMDP) is the development of stress-managed magnets with minimal training and operating near the short sample limit. Training free behavior was previously demonstrated in a paraffin-wax-impregnated subscale (canted-cosine-theta) CCT dipole as part of the CCT subscale magnet program at Lawrence Berkeley National Laboratory. A subsequent Alumina-filled wax impregnated subscale CCT dipole reached the predicted short-sample limit after a single quench in the magnet. The addition of the Alumina filler to the paraffin wax improves the mechanical properties, which could be critical for high field applications with large Lorentz forces. In this work, we present the technical developments for the fabrication of a 90 mm diameter aperture CCT magnet, CCT5-W, with a predicted short sample bore field of approximately 10 T at 4.5 K. The performance of the magnet is compared to a previously tested, otherwise identical, epoxy impregnated magnet, CCT5. The implications of filled-wax impregnation for future magnets operating at higher fields is discussed.
This work was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, through the US Magnet Development Program under contract No. DE-AC02-05CH11231.
