Superconducting magnet designs for the SSC and RHIC

This paper reviews the main dipoles for RHIC, which are 9.7 meters long with an operating field of 3.45 T. Four full size dipoles have been tested and all exceeded the operating field. The main dipoles for the SSC project are 17 meters in length with an operating field of 6.6 T. Five of these have been tested. Rough calculations show that the possibility of operating future such large colliders at --80 K instead of --4 K is unlikely to have a major impact upon their cost or feasibility. However, increasing the critical field of practical superconductors (either by lowering the operating temperature or further conductor development) could have a major impact upon the specialized magnets used in the intersection regions of such machines