Abstract

In 2018 the high energy X-ray beamlines P07[1] and P21b[2] at DESY’s storage ring PETRA III received new undulators. The two identical devices were built by an industry collaboration of Research Instruments GmbH and Kyma S.p.A. according to DESY’s specifications. They have a magnetic length of 4 m, a period length of 21.2 mm and a deflection parameter K of 1.41 at a gap of 7.0 mm. We report about experience during magnet tuning, the final acceptance measurements and the commissioning in the accelerator tunnel.

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