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Figure 10
Energy errors from a type I spectrometer consisting of seven Al foils. While the predicted error first dips below 1% near 2.7 keV, the transmission efficiency is too small at this energy (4 × 10−4). The transmission efficiency limits the measurement until 3.8 keV. The spectrometer then provides good measurements of energy up to 11 keV. Curves show predicted energy errors observed by the first (filled squares), second (open squares), third (filled diamonds), fourth (open diamonds), fifth (filled circles), sixth (open circles) and seventh (crosses) image in the series. These correspond to the signals observed through 20, 40, 60, 80, 100, 120 and 140 µm of aluminium. Simulation corresponds to a signal consisting of 10000 X-rays. Note: in contrast to the type II spectrometer, the I0 signal is collected in the absence of a foil.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 5| August 2005| Pages 618-625
doi:10.1107/S0909049505022600
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