Edge radiation and its potential to electron beam diagnostics at HiSOR

The visible edge radiation generated by a relativistic electron beam at fringe fields of bending magnets in storage rings differs significantly from the well-known standard synchrotron radiation. An intensive peak appears in the electromagnetic radiation angular distribution. Its intensity exceeds considerably the intensity of synchrotron radiation. In addition, the radiation generated at two adjacent edges of bending magnets produces an interference pattern. The real electron beam parameters (its transversal sizes and angular spread) have effect on the radiation intensity distribution. It is possible to find the electron beam parameters from the experimentally measured edge radiation distribution. Such electron beam diagnostics as applied to HiSOR storage ring (Hiroshima, Japan) is discussed in the present paper.