Characterization of the Support and Drive System of the PETRA III APPLE Undulator

Helmholtzzentrum Berlin has built an APPLE II undulator for the storage ring PETRA III. The device has a total length of 5 m and a minimum gap of 11 mm. The high magnetic forces in particular in the inclined mode have been analyzed by means of finite element methods (FEM). Specific mechanic componen...

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Bibliographic Details
Published in:Proceedings of the 10th International Conference 2009-10, Vol.1234, p.503-506
Main Authors: Bahrdt, J, Backer, H-J, Frentrup, W, Gaupp, A, Gottschlich, S, Kuhn, C, Scheer, M, Schulz, B, Gast, M, Englisch, U, Schops, A, Tischer, M
Format: Article
Language:English
Subjects:
Apples
Computer simulation
Control systems
Devices
Finite element method
Interferometers
Lasers
Mathematical analysis
Mathematical models
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Summary:Helmholtzzentrum Berlin has built an APPLE II undulator for the storage ring PETRA III. The device has a total length of 5 m and a minimum gap of 11 mm. The high magnetic forces in particular in the inclined mode have been analyzed by means of finite element methods (FEM). Specific mechanic components such as flexible joints have been optimized to cope with the gap- and shift-dependent 3D-forces and a sophisticated control and drive system has been implemented. After completion of the device, detailed laser interferometer measurements for all operation modes have been performed. The data are compared to the FEM simulations.
ISSN:0094-243X