Extracting edge radiation within a straight section of an electron storage ring

Edge radiation may be extracted within a straight section of an electron storage ring by using a tilted mirror with a hole (or slot) for passage of the electron beam and its velocity field. At wavelengths much greater than the critical wavelength of the ring’s synchrotron radiation, the flux distribution upon the mirror is almost independent of wavelength. When the reflected radiation is extracted through a nearby window, diffraction reduces the extracted flux at wavelengths exceeding ∼2π times the hole radius. For the Aladdin 800 MeV electron storage ring, the extracted edge radiation may find application as a broadband source for wavelengths of 1 μm–60 mm or as a diagnostic of the bunch dimensions.