Hi Djam, others, I think that one of the reasons that the deltaY fluctuates in the MRS more than in the FFS is that TPC drift velocities have been calibrated for the FFS. I don't think that it was done for the MRS. Of course, Peter did all the work, so I am sure that he will correct me if I am wrong. Cheers, Ian > -----Original Message----- > From: owner-brahms-l@bnl.gov [mailto:owner-brahms-l@bnl.gov]On Behalf Of > Djamel Ouerdane > Sent: 4. februar 2002 20:05 > To: brahms-l@bnl.gov > Subject: Track matching offsets > > > Hi all, > > During some analyses, I had to determine track matching offsets > in the MRS > and FFS (BFS is on its way) for a big bunch of runs. In order not to get > bored, I made a script to do it fast. You can check the result here: > > http://www.nbi.dk/~ouerdane/match > > You will notice some funny behaviours in dY and dAng as a function of run > number. > > The FFS tracking shows that it's fairly stable, despite a few jumps (I > checked the histograms and it really did that!) > > The MRS is not as stable. Notice also how dAng goes to zero for the > later runs (after 5730). > > Of course, these runs have different field settings and background > conditions. But it's nice to see the behaviour of these offsets over this > long period of time. > > Djam > > -- > Djamel Ouerdane ------------------------------------------o > | Niels Bohr Intstitute | Home: | > | Blegdamsvej 17, DK-2100 Ø | Jagtvej 141 2D, | > | Fax: +45 35 32 50 16 | DK-2200 Copenhagen N | > | Tel: +45 35 32 52 69 | +45 35 86 19 74 | > | http://www.nbi.dk/~ouerdane | > | ouerdane@nbi.dk | > o---------------------------------------------------------o > > >
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