# New Revolver Undulator for ID18

16-06-2004

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A new "revolver" undulator was installed at ID18 during this winter shutdown. The availability of two interchangeable magnetic structures (32 mm and 20 mm period) allows for better optimisation of the X-ray flux for various energy regions. In particular, the new 20 mm period magnets double the flux at 14.4 keV (see figure).