A 40 mm bore quadrupole magnet for the SSC

A 40-mm bore quadrupole magnet design, called QC, has been made for the SSC (Superconducting Super Collider) with the following parameters: a 208-T/m gradient at 6500 A and a two-layer cos 2 theta winding arrangement with 30-strand cable and one spacer wedge per coil. Structural support is provided by self-supporting interlocking collars; two types of symmetrical laminations are preassembled into collar packs for ease of assembly. A description is given of the design of a prototype quadrupole magnet for the SSC and preliminary test results on 1-m models.