Conclusions

We have produced a simulation which allows us to calculate the resolution of detectors of different modularity and strip pitches. In addition, it lets us optimise the strip pitches for a given mechanical design.

A number of important points have been established.

• It is extremely beneficial to use an intermediary readout strip at small angles (<7^o).
• It is better not to use an intermediary strip at larger angles, especially if we have poor signal-to-noise
• For large angles (>15^o), the resolution is independent of readout pitch.
• For large angles (>15^o), the resolution is poor ($>10\mu$m). For this reason, unless there are overwhelming mechanical reasons, we would advise against an 8-fold geometry.

At the present time, the best design would appear to be of 12-fold modularity with a variable readout pitch from $50\mu$m in the centre to $90\mu$m at the edges. This also ties in well with the number of readout chips, the cable lengths, and the triggering modularity of SVX.