The present invention provides a charged particle spin polarimeter capable
of resolving with high efficiency the magnetic moment of a charged
particle. The charged particle spin polarimeter has a pair of convex and
concave magnetic poles to apply a magnetic field with gradient to an
incident charged particle and a pair of plain plate electrodes to apply,
to a charged particle, an electric field for canceling a Lorenz force
that the charged particle receives from the magnetic field. The magnetic
moment in the magnetic field direction of a charged particle is resolved
by the interaction between the gradient of the magnetic field and the
magnetic moment of the charged particle.