Influence of higher harmonics of the undulator in X-ray polarimetry and crystal monochromator design

J Synchrotron Radiat. 2015 Sep;22(5):1151-4. doi: 10.1107/S1600577515011510. Epub 2015 Jul 15.


The spectrum of the undulator radiation of beamline P01 at Petra III has been measured after passing a multiple reflection channel-cut polarimeter. Odd and even harmonics up to the 15th order, as well as Compton peaks which were produced by the high harmonics in the spectrum, could been measured. These additional contributions can have a tremendous influence on the performance of the polarimeter and have to be taken into account for further polarimeter designs.

Keywords: Compton scattering; X-ray diffraction; monochromator; polarimetry; undulator high harmonics.

Publication types

  • Research Support, Non-U.S. Gov't