Hi Flemming Ian and all, I realized that after having the "full" T1 and T2 calibration T2 projected tracks to T3 T4 and T5 detectors have systematic offsets if dy namely ~0.5cm for T3 1.3cm and 2.cm for T5. I found that by changing T2 horizontal rotation from 0 to -0.126 deg and rising T2 by 0.1cm (from 0.8 to 0.9cm) we can remove all this offsets and additionally we get perfect consistency with y-slopes for all T2-DC combinations. Additionally if we rotate T1 horizontally by -0.08 deg and rise it by 0.5 (from 0.8 to 1.30cm) we obtain a nice consistency between T1-T2 and T1-DCs. I also made a test with the new geometry and I got nice consistency for matching peaks (I will provide the figures soon). I think that we should update geometry in the db for the QM analysis. We are just about to start doing the global tracking. Regards Pawel. -- ---------------------------------------------------------------------- | Pawel Staszel | | Niels Bohr Institute Tb 8 email: staszel@nbi.dk | | Blegdamsvej 17 phone: (+45) 35 32 53 51 | | København Ø FAX: (+45) 35 32 50 16 | | Danmark | ----------------------------------------------------------------------
This archive was generated by hypermail 2b30 : Tue Jun 18 2002 - 10:08:20 EDT