An essential accelerator electromagnet that optimizes overall beam quality by correcting chromatic aberrations.

A sextupole magnet features six alternating magnetic poles that generate a non-linear quadratic magnetic field. While beams passing through quadrupole magnets suffer from chromatic aberrations due to energy deviations, the sextupole magnet corrects these aberrations. This correction ensures that charged particles with varying energy levels are precisely focused at the exact same focal point.