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In the table below are summarized the various tolerances. I reiterate that these apply if you want to preserve the option of efficiently extracting the vertex using no alignment calibrations.
| efficiency loss | Si panel z-placement tolerance | Si panel angular placement tolerance | max bow-out at midpoint | max humidity excursion |
| -5% | 0.08 mm | 0.21 degrees | 0.1 mm | 9% |
| -10% | 0.16 mm | 0.42 degrees | 0.2 mm | 18% |
As for the global positioning, the vertex finding algorithm has been upgraded
so that is tolerant of lateral displacements of the MVD, relative to the mean
beam position, of at least 3 mm. In addition, the algorithm is insensitive to
small (at least 0.3 °) rotations of the MVD relative to the beam axis.This essentially removes global MVD
mounting requirements.
(Link to updated CDR pages on alignment requirements with
these new numbers.)
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