Spin light in an asymmetric wiggler

Spin light is a radiation of an intrinsic magnetic dipole of an electron associated with its spin. Quantum corrections descriptive of the interference between the radiation of the electron charge and the spin light in an asymmetric wiggler are obtained. It is shown that this part of radiation is proportional to a small parameter equal to the ratio of the photon energy to the electron one and depends on the initial direction of the spin. Linear and circular polarizations are studied. It is shown that the degree of circular polarization does not vanish to zero even in the case of symmetric wiggler and the sign of polarization depends on the sign of the spin projection. Radiation of a three-pole snake is discussed.