The can also be used to bend particles, but, except in special circumstances, it is easier to use magnetic fields for bending. Circular electron accelerators and storage rings produce copious synchrotron radiation in all the bending magnets, especially when the magnetic fields are high or the beam energy is high. In a circular machine, the radiation is caused primarily by the bending magnets. When the particles radiate, they loose energy. The particle energy is replentished by a radio frequency cavity that uses an electric field to increase the energy of the particles.
Synchrotron radiation is a huge nuisance when the goal is to accelerate electrons.
These researchers have a voracious appetite for synchrotron radiation. These magnets consist of an alternating set of bending magnets. The net bend in a wiggler magnet is zero. The intensity and frequency of the light is determined by the parameters of the wiggler magnet. You can get more details from the web pages of the many synchrotron light sources around the the world.