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Similar measurements were made on SN31179 in three dimensions, results summarized here:
| Dimesnion | Mean rms displacement |
|---|---|
| z (beam) | 72nm |
| y (dispersion) | 95nm |
| x (cross-dispersion) | 142nm |
These measurements are represent differential movement of the sensor mount relative to the chamber. "Background' measurements comparing adjacent spots on the chamber were of order 20-30nm rms.
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