Long-term variation of VDCtop and bottom resolution after 1st stage spline correction for COSMIC RAY is shown below. We do not need any time-to-time reconstruction of spline correction functions, as far as checked by cosmic ray. But, we need to confirm it by BEAM. Then, the realistic resolution for beam is estimated at the same time.
Subjects to be done on tracking (in order) ....
1. PDC tracking: Under construction. Shift correction, time-to-time dt-dx reconstruction are not done yet -
2. VDCbottom relative rotation and position shift determinations by cosmic ray.
3. BLC relative rotation and position shift by K^+-VTC triggered (K^+ * VTC) run.
4. PDC relative rotation and position shift by K^+-VTC triggered (K^+ * charged) run.
5. Chamber tracking and single-plane efficiencies and their long-term stability. -> Some efficiencies for some dedicated purpose(or trigger pattern) would be studied after those requirements are recognized.