DIAGNOSTIC FRONT-END FOR BESSY-II

For BESSY II, synchrotron radiation beam diagnostics will be incorpora ted in both the insertion-device front ends and the dipole-beamline fr ont ends. In order to gain a complete picture of the source characteri stics, a diagnostic front end has been designed and tested for dipole radiation. This consists of (i) a pinhole array imaging system, (ii) a double-blade system for the determination of the vertical center of g ravity of the synchrotron radiation fan, and (iii) a Bragg-Fresnel mul tilayer system for the most precise image information about the source size and shape.