1. Pavel Šťavina, Bratislava 2004 Slovak contribution to experiment ATLAS  Even though Slovakia is small country with limited finances we have fulfilled all our obligations at experiment ATLAS.  Slovak contribution is well known within the ATLAS community

2. Pavel Šťavina, Bratislava 2004 CERN

3. Pavel Šťavina, Bratislava 2004 Experiment ATLAS

4. Pavel Šťavina, Bratislava 2004 ATLAS cavern

5. Pavel Šťavina, Bratislava 2004 ATLAS cavern

6. Pavel Šťavina, Bratislava 2004 Slovak ATLAS community  All members of Slovak ATLAS group are involved in calorimetry  HEC group ( D. Bruncko)  TileCal group (S. Tokár)

7. Pavel Šťavina, Bratislava 2004 HEC activities  Main obligation of Slovak HEC group is the electronic calibration system for HEC  Part of the system was cold test software  Other part of the system is calibration within all beam tests  The group is involved at MC simulation software development as well

8. Pavel Šťavina, Bratislava 2004 HEC cold tests  Within the HEC sub-detector construction, Slovak group was responsible for cold- testing software development  Totally 132 modules were cold-tested  No delay was caused due to our software  Project was successfully finished at 2003

9. Pavel Šťavina, Bratislava 2004 HEC cold tests

10. Pavel Šťavina, Bratislava 2004 HEC beam test calibration  Software for calibration data acquisition and analysis was developed  Quality check using the calibration data

11. Pavel Šťavina, Bratislava 2004 HEC beam test calibration

12. Pavel Šťavina, Bratislava 2004 Beam tests MC simulation

13. Pavel Šťavina, Bratislava 2004 Geant4 physics validation  Geant4 is still under development therefore authors need a feedback from users  Precise comparison of simulated and experimental beam test data was used to verify hadronic physics at G4 environment

14. Pavel Šťavina, Bratislava 2004 Geant4 physics validation

15. Pavel Šťavina, Bratislava 2004 TileCal activities  Test Beam Data reconstruction  PMT Tests using the Single Photoelectron Analysis  Top Quark Physics – determination of the top quark charge  Fast MC simulation of Calorimeter Response

16. Pavel Šťavina, Bratislava 2004 TileCal activities  Test Beam Data reconstruction  PMT Tests using the Single Photoelectron Analysis  Top Quark Physics – determination of the top quark charge  Fast MC simulation of Calorimeter Response

17. Pavel Šťavina, Bratislava 2004 Test Beam Data Reconstruction Data from Test Beams analysed:  Calorimeter response to pions investigated (linearity, homogeneity, energy resolution)  A method of energy reconstruction using topology of hadronic shower proposed

18. Pavel Šťavina, Bratislava 2004 PMT Tests using Single p.e. Analysis TileCal PMTs tested using the single ph.e. method elaborated in Bratislava: PMT excess factor found (needed to find the energy to signal factor) Details of PMT structure seen (1 st dynode effect) A PMT spectrum analysed by the single p.e. method

19. Pavel Šťavina, Bratislava 2004 Top Quark physics Possibility of the ATLAS exp. to determine the top quark charge (2 approaches)  Via radiative top production ( ) matrix elements implemented into PYTHIA  By the charges of top decay products Results: The Atlas has a capability to determine the top charge in one LHC year (10 fb -1 sample) for both approaches

20. Pavel Šťavina, Bratislava 2004 Fast MC Simulation of the ATLAS Calorimeter The fast MC code for TileCal created  works 1000  faster than the full simulation Works continue to create the fast MC for full Calorimeter Fast MC vs Test beam data

21. Pavel Šťavina, Bratislava 2004 Conclusions  In addition to electronic calibration now we start to deal with physics calibration. 1-5 th Dec. 2004 we organize the workshop concerning this topic  ATLAS software (Athena framework) independent validation

22. Pavel Šťavina, Bratislava 2004 Conclusions  Precise analysis of detector (calorimeter) physics with the aim to improve detector performance.  Focusing to some processes of possible physics  More experienced physicists are expected to come back to Slovakia