Hi, I've added more plots showing FS efficiencies, to see them go to http://www.nbi.dk/~staszel/fs/efficiency/ Regards Pawel. Pawel Staszel wrote: > Hi, > I calculated efficiency in all FS detectors, except the Cherenkovs (C1 > and RICH), for all > the runs between 5361 and 5823 (4 deg, field 1/5, 1/3 and 1/2) . > The results are stored on rcas in the file > ~ufstasze/effic/Effic5361_5972.root as a > 3-dim histograms. The histograms are named like in the following > example: > Rot4Field1_3B_T5, > 4 - rotation > 1_3B - filesd 1/3 at B polarity > T5 - detector T5. > Title of each histogram contains list of runs which were used in the > calculations. > x, y, z axis of each histogram is related to centrality ([%],using > Tile+Si), local x position in given detector [cm] > and local x-slope [rad] in a given detector, so the histograms contain > efficiency versus centrality, > x add x-slope. To see the binning one can do > (Rot4Field1_3B_H1->Project3D("x"))->Draw();, and the same for "y" and > "z". > > I haven't attempt to parametrize the efficiency, and in many cases this > is very problematic, > e.g. to go from 3 dim. to 1 dim. distribution one have to integrate over > two of the 3 variables, using > some sample of tracks. The problem is, that the samples we use after the > pid cuts can significantly differ from > the sample of my reference tracks (different x and x-slope > distributions, and different bias on centrality) > and the averaging will lead to a different results. > Opinion and suggestions are very welcome. > > If everything goes well I will add efficiency calculations for run > between > 5513 and 5972 (3 deg-1/2, 8 deg-1/5, 12 deg - 1/5,1/2,2/3). > > Some debbuging/analysis plots are available from > http://www.nbi.dk/~staszel/fs/efficiency/ > > 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 | > ---------------------------------------------------------------------- -- ---------------------------------------------------------------------- | 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 | ----------------------------------------------------------------------
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