The generic beamline concept of the PETRA III undulator beamlines

The conversion of the PETRA storage ring at DESY to a third generation synchrotron radiation light source [1] poses a challenge to the design of the beam transport system. The total power in the white beam will be as high as 7.5kW in the case of the 5m long undulator at 100mA. The power density will be 476 W/mm(2) at 20m from the source. Upgrades to a beam current of 200mA have to be accounted for in the design of the beamline components. For the beam transport between the undulator and the experimental hall, the design of a genetic bearnline is presented. It contains all elements which are needed to guide the beam to the experiment. This genetic bearaline consists of the estimated maximum of components for this purpose. Special experimental needs may reduce the number of proposed devices in the genetic part and add special optical devices close to the experiment, c. g. strong focusing. The paper focuses on the girder concept for all major beam transport components and the collimating shutter system which has to deal with the high power density of the PETRA III undulators.