Fig. 6. Photostability tests of an FND scintillator with 13.5 nm radiation from the BL08B beamline. The beam flux used was 7.7 × 1011 photons per s with a beam spot area of ∼0.46 mm2. The measured fluorescence intensities were normalized by the photocurrents of a calibrated photodiode. (Inset) Images of the beam at the beginning (left) and end (right) of the measurements, showing a negligible change in beam profile after continuous operation for 6 h.
