corrector magnet

Quadrupole magnet (focusing magnet and corrector magnet)

The Compass has fully integrated correction facilities utilising four corrector magnets to ensure consistent control of "B" & "C" coefficients across the whole azimuth range.

Swing onto South and adjust the athwartship corrector magnet to take out half the error then swing onto West and take out half the error.

The US groups have built super-conducting corrector magnets, proton beam monitor electronics, the second neutrino horn and a GPS time synchronization system for the T2K neutrino beamline; and a pi-zero detector and a side muon range detector (partial detector) in the T2K near detector complex.