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High harmonics were causing some extra reflections; were removed by going away from the middle of the pitch to ~90% of intensity.

18.12.19

The cryo was installed during the day.

Ka/Kb in the same spectrometer configuration was measured in the evening and night. Alignment was not easy,  because samples were not thin: there was sometimes a double layer.

19.12.19

Next set of samples go into the cryo at 2 pm. This time they are supposed to be finer powder and the captons should be stuck together.