https://doi.org/10.1140/epjp/s13360-022-03517-6
Regular Article
The synchrotron radiation source PETRA III and its future ultra-low-emittance upgrade PETRA IV
1
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
2
Department Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany
Received:
27
August
2022
Accepted:
19
November
2022
Published online:
6
December
2022
PETRA III at DESY is one of the brightest synchrotron radiation sources worldwide. It serves a broad international multidisciplinary user community from academia to industry at currently 25 specialised beamlines. With a storage-ring energy of 6 GeV, it provides mainly hard to high-energy X-rays for versatile experiments in a very broad range of scientific fields. It is ideally suited for an upgrade to the ultra-low emittance source PETRA IV, owing to its large circumference of 2304 m. With a targeted storage ring emittance of 
PETRA IV will reach spectral brightnesses two to three orders of magnitude higher than today. The unique beam parameters will make PETRA IV the ultimate in situ 3D microscope for biological, chemical, and physical processes helping to address key questions in health, energy, mobility, information technology, and earth and environment.
© The Author(s) 2022
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