We present conceptual designs for 24-27 MW hybrid magnet inserts gener
ating more than 31 T in a warm bore of 32 mm to be installed at the ne
w National High Magnetic Field Laboratory (NHMFL). The insert housing
is designed to accommodate both axially and radially cooled magnets al
though here we only present axially cooled designs. The magnet coils a
re radially partitioned (poly-Bitter) to provide high fields at modera
te stress and cooling levels. GlidCop, Cu-Be and Cu-Ag conductors are
considered providing resistive fields as high as 34 T in a background
field of 14 T.