Run 128048: Oct 1, 2001: cutting on 2 tracks > 2GeV/c

1. Impact parameter vs. event number
2. Impact parameter distribution
3. Impact parameter vs. phi
4. Idem barrel by barrel
5. Impact parameter tails
6. z0 from COT for different SVT barrels
7. SVT acceptance in z-phi
8. SVT_phi vs. COT_phi
9. x-y beam positions barrel by barrel