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Neutron spectra at different chopper settings. Black: Δλ/λ = 1% (chopper pairing 1 and 2 with chopper distance set to 80 mm). Red: Δλ/λ = 5% (chopper pairing 1 and 2 with chopper distance set to 480 mm). Green: Δλ/λ = 12% (chopper pairing 1 and 2B with chopper distance fixed at 960 mm). The intensity is normalized to the beam monitor counts.
