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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. CERN. Experiment ATLAS. ATLAS cavern. ATLAS cavern.

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slovak contribution to experiment atlas
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

Pavel Šťavina, Bratislava 2004

slide2
CERN

Pavel Šťavina, Bratislava 2004

experiment atlas
Experiment ATLAS

Pavel Šťavina, Bratislava 2004

atlas cavern
ATLAS cavern

Pavel Šťavina, Bratislava 2004

atlas cavern1
ATLAS cavern

Pavel Šťavina, Bratislava 2004

slovak atlas community
Slovak ATLAS community
  • All members of Slovak ATLAS group are involved in calorimetry
  • HEC group ( D. Bruncko)
  • TileCal group (S. Tokár)

Pavel Šťavina, Bratislava 2004

hec activities
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

Pavel Šťavina, Bratislava 2004

hec cold tests
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

Pavel Šťavina, Bratislava 2004

hec cold tests1
HEC cold tests

Pavel Šťavina, Bratislava 2004

hec beam test calibration
HEC beam test calibration
  • Software for calibration data acquisition and analysis was developed
  • Quality check using the calibration data

Pavel Šťavina, Bratislava 2004

hec beam test calibration1
HEC beam test calibration

Pavel Šťavina, Bratislava 2004

beam tests mc simulation
Beam tests MC simulation

Pavel Šťavina, Bratislava 2004

geant4 physics validation
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

Pavel Šťavina, Bratislava 2004

geant4 physics validation1
Geant4 physics validation

Pavel Šťavina, Bratislava 2004

tilecal activities
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

Pavel Šťavina, Bratislava 2004

tilecal activities1
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

Pavel Šťavina, Bratislava 2004

test beam data reconstruction
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

Pavel Šťavina, Bratislava 2004

pmt tests using single p e analysis
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 (1st dynode effect)

A PMT spectrum analysed by

the single p.e. method

Pavel Šťavina, Bratislava 2004

top quark physics
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

Pavel Šťavina, Bratislava 2004

fast mc simulation of the atlas calorimeter
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

Pavel Šťavina, Bratislava 2004

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

Pavel Šťavina, Bratislava 2004

conclusions1
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

Pavel Šťavina, Bratislava 2004