Software development news and problems.

Software/analysis meeting 22.10.05.

E.Choumilov on behalf of OfflineSoftware group.

1) Bug in the Birks’ law simulation codes of Geant3 (GBIRK routine) is corrected ( Z>1 were affected).

2) Better parametrization of Birks’ law is introduced (thank to V.Choutko). It improves behaviour at high Z. The parameters were defined by fit to TOF ions test-beam data. Now saturation effect is already visible for carbon (z=6, ~ 10% effect) and rise to ~30% for aluminum(Z=13).

3) As the consequence new set of TOF dE/dX MC reference distributions was generated (only for Z=1-9). Extension to higher Z-range have to be done simultaneously with tracker (and other subdetectors). Particle charge calculation algorithm should be modified to implement other subdetectors measurements (RICH, TRD). 4) All TOF simulation/reconstruction/calibration software was modified to implement new (final) readout scheme (gain-5 readout was removed both for anodes and dynodes). DB files were recreated according to new format. 5) TOF SFET(A,C) boards temperature data handling algorithm have to be developed for event-by-event time/charge corrections. Participation of

TOF hardware group is absolutely needed.

6) Fast/level1 trigger configuration data (like mask of TOF paddles/sides included in the trigger decision logic, TOF-layers AND/OR-ing scheme, mask of subtrigger branches etc) were collected in one object and introduced in DB-structure. ANTI/ECAL trigger configuration parameters have to be added (need input from ECAL-group).

7) TOF-section of AMS online monitor was developed. The following sections were developed earlier : LVL1, RICH, AxAMS (need to be extended). The ANTI, ECAL, TRACKER, TRD sections are still missing and wait for volunteers (i can provide ANTI section also if there is no other pretenders). As an example few pictures from TOF-section are shown below.