SPring-8, the large synchrotron radiation facility

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Fig. 1. Comparison between brilliance values for old and new operations calculated by SPECTRA7.2

In the calculation, parameters of the long undulator at BL19 were used. The red and blue lines show the brilliance values utilized in the new and old operations, respectively, assuming that gaps of all insertion devices are closed to the typical gap positions. The symbols: 1st, 3rd and 5th in the figure represent the first, third and fifth harmonics of a fundamental frequency of undulator radiation, respectively.