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Figure 5
Time diagram for the 30 Hz pulse-rejection operation. The instrument setup is the same as that in Fig. 4[link]. Higher frames from even-numbered pulses are effectively blocked by the choppers up to λ = 65 Å. However, neutrons in the range λ = 13.65–17.35 Å (thicker solid and dashed lines) from odd-numbered pulses will leak through, contaminating the beam. Delaying the opening of the T1 chopper improves the situation somewhat but will not eliminate the leakage.

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