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.
>> The raise of 0.8->1.3 IS NOT CONSISTENT with the survey. And clearly point so some other problem. Possibly
uncertainty in the Vdrift determination.
The angles between T1 T2 was afterall determined from zero-fierlds runs to a very small d(alpha). You
do afterall change the angle between T1-2T by about (-0.08-(-0.126))= -0.046 deg == 0.8 mrad which I thibk is not consistent with the zero-field
runs.?
Once we quickly digested these proposed changes,
it seems reasonable to put the in DB for QM at least.
Flemming
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