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Tuning curves for two phased APS type-A undulators. Undulator brilliance calculated for these parameters: APS storage ring operating at a beam energy of 7.0 GeV, 100 mA ring current, 2.51 nm rad low-emittance lattice, 1.5% coupling, minimum undulator gap of 11.0 mm, two 2.4 m-long undulators, with phasing factors of 0.75 (harmonic 1) and 0.90 (harmonic 3).
