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![[Figure 1]](ok5084fig1mag.jpg)
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Figure 1
(a) Simulated and measured undulator spectra in planar mode for an undulator gap of 30 mm. The beamline opening is 0.1 mrad. The monochromator grating features 1221 lines mm−1. The inset shows the agreement between the simulated and measured spectra for the first harmonics at 115 eV (logarithmic scale on the intensity axis); the small energy shift has been corrected. The experimental undulator spectrum was measured right after the exit slit of the beamline. (b) Calculated map of the undulator spectra showing the degree of circular polarization of the photon beam at the fixed phase of 14 mm. The locations of the third and fifth harmonics are indicated by the blue curves. (c) Reflected X-ray intensities versus azimuth angles of the multilayer analyzer in the polarimeter when the undulator, i.e. the gap and phase, were configured to several simulated polarization angles in the inclined mode. The photon energy is 708 eV, and 0° (90°) means the polarization of the X-rays is linearly horizontal (vertical). |
![[Figure 1]](ok5084fig1.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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