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Figure 12
Measured and calculated undulator spectra (flux density) of the first harmonic of the undulator radiation from the 4 mm-period undulator with 100 mm length. Five spectroscopic data sets with the highest energy distribution among several tens of data sets acquired at gaps of 1.5, 1.7 and 2.0 mm are shown. The calculated spectra are denoted by the thick dotted curves for each gap. The calculations were made on the basis of the measured parameter set of the electron beam of the t-ACTS, by selecting an electron energy of 33.49 MeV at a gap of 1.5 mm, 33.53 MeV at a gap of 1.7 mm, and 33.57 MeV at a gap of 2.0 mm.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 6| November 2019| Pages 1902-1910
https://doi.org/10.1107/S1600577519013031
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