Overview PETRA IV beamline portfolio. (Graphics: DESY, Gesa Harms)
Beamline Portfolio Development Process
The new beamline portfolio was developed on the basis of the Scientific Instrumentation Proposals (SIPs) provided by the user community and with advice from the DESY Photon Science Committee (PSC). For this, experts from DESY and the partner institutes as well as an independent expert team suggested sets of beamlines to the directorate.
Based on the approved beamline portfolio, the technical design is generated by responsible team leaders and engineers. They are supported by the PETRA IV work package groups and a beamline optics simulation team. The technical designs of the beamlines are reviewed by work package WP3.08 and an engineering and operation review team. After the presentation of the beamline TDR section to the PSC, the DESY directorate approved it. Technical aspects of the beamlines will be further refined even after the TDR has been submitted.
Site plan with PETRA IV storage ring and four experimental halls (incl. the new hall). (Illustration: DESY, Science Communication Lab)
Distribution and Number of Beamlines
In order to achieve X-ray beams with ultra-low emittance, the canting schemes of undulators, as realized at PETRA III, is not possible anymore. Therefore, in the three present experimental halls (Max von Laue, Ada Yonath, and Paul Peter Ewald) space for 19 photon beamlines is available (5 of theses spaces will remain free, leaving room for new technologies and collaboration with companies in future). In order to preserve the number of beamlines and experiments and to be able to extend the beamline portfolio in the future, a 4th experimental hall 'PXW' in the west of PETRA is foreseen. This hall can accommodate an additional 18 photon beamlines.
PETRA IV is planned for in total 36 photon beamlines.
The “flagship” beamlines will be designed to make optimal use of the extreme brightness of the source. These beamlines will be selected during the TDR phase of PETRA IV. With the current design of the PETRA IV storage ring, many beamlines will gain both in brightness and in flux, as the electron beam emittance is significantly reduced and the length of most insertion devices can be increased to 5 m or more in the case of the flagship beamlines.
Generally, there is more space at each beamline compared to PETRA III today to add the lab space and infrastructure needed for in-situ/operando and high-throughput experiments.
