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Drift Chamber Reconstruction Status (Drift Chamber Group)

Drift Chamber Reconstruction Status (Drift Chamber Group). (cm). big cells. small cells. (cm). Residuals distribution from TRKMON (L3Bhabha). blue run 29062 red reference. Blue 21% is Ntrk > 3. Red 14% is Ntrk > 3. Split tracks in Bhabha events (I). Improved wrt 2002. blue run 29062

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Drift Chamber Reconstruction Status (Drift Chamber Group)

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  1. Drift Chamber Reconstruction Status(Drift Chamber Group)

  2. (cm) big cells small cells (cm) Residuals distribution from TRKMON (L3Bhabha) blue run 29062 red reference

  3. Blue 21% is Ntrk > 3 Red 14% is Ntrk > 3 Split tracks in Bhabha events (I) Improved wrt 2002 blue run 29062 red reference Small excess of Ntrk > 3 (broken tracks)

  4. Small cells Big cells (ns) Split tracks in Bhabha events (II) Investigate the effects of longer deadtime wrt to 2002 (due to longer ADC gate needed) Red events with more than 2 reconstructed tracks Blue events with only 2 reconstructed tracks To reduce the number of broken tracks a possible solution can be: Reject hits with Tdrift > 2.5 ms (clearly only for 2004 runs)

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