FR 003 The PETRA III Girder-Concept

Since alignment tolerances of the focusing quadrupoles and the dipoles at a 3rd generation synchrotron light source like the PETRA III ring are very tight and downtime allowances for survey are low, a concept of pre-aligned magnets on girders has been developed. This presentation focuses on the development efforts of a low-cost girder system with cheap but nevertheless effective alignment mechanics. Some results of girder deformations during transportation of readily assembled and precisely aligned girders are shown. Besides that, achievements in the development of new ultrasonic hardware for the recently developed DESY-HLS are presented. 1