Dipoles
Charged particles travel along the spiral trajectory in the uniform magnetic field. In the field of strength B0, a relativistic electron with the momentum component p transverse to the field vector, will obtain the radius of curvature R in the plane transverse to the direction of magnetic field, given by:
Dipoles are used in the electron accelerator laboratories as bending magnets, as well as energy spectrometers, and chicane bunch compressors.
