An update on passive correctors for the SSC dipole magnets

Correction of magnetization sextupole and decapole in a 5 centimeter bore SSC dipole using passive superconductor

“…Passive superconductor inside the dipole bore works best when the correction superconductor filaments are 1.4 to 1.7 times larger than the filaments in the inner cable superconductor. 5 Since the passive superconductor carries no transport current, the copper to superconductor ratio in the corrector superconductor can be made as low as possible provided the superconductor critical current density is as high as the critical current density of the dipole conductor (27S0 Amnv 1 at ST and 4.2 K) and the filament spacing is greater than 1 micron (to avcid proximity coupling). 6 The corrected dipole shown in Fig.…”