Design Study of High Brilliant Optics at the SPring-8 Storage Ring

At the SPring -8 storage ring, design study of beam optics concentrating particularly on increasing brilliance , not flux density, is in progress besides continuous efforts of increasing both brilliance and flux de nsity for the user optics . The natural emittance s are theoretically reduced from 2.41 nmrad at 8 GeV to 2.27 nmrad (8 GeV ), 1.78 nmrad (7 GeV ) and 1.33 nmrad (6 GeV ) by utilizing an emittance damping effect by the insertion devices . The designed optics has experimentally been examined at 6 GeV , and the electron beam parameters have been confirmed by measurements at the diagnostics beamlines .