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Simulation of soft photon calorimeter

JINR, DUBNA Student Practice. Simulation of soft photon calorimeter. 2011. Participant list. Vaclav Kosar Czech Technical University in Prague Viktor Burian Czech Technical University in Prague Andra-Georgia Ibanescu University of Bucharest.

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Simulation of soft photon calorimeter

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  1. JINR, DUBNA Student Practice Simulation of soft photon calorimeter 2011

  2. Participant list • Vaclav Kosar Czech Technical University in Prague • Viktor Burian Czech Technical University in Prague • Andra-Georgia Ibanescu University of Bucharest

  3. JINR group: High Multiplicty (Baldin and Veksler Laboratory of High Energy Physics ) • Igor Rufanov • Elena Kokoulina • Vladimir Nikitin

  4. Physics goals • To understand photon production and it’s importance for collective phenomena explanations. • To get familiar with GEANT, PYTHIA, PAW • To simulate the spectra of photons produced in high energy collisions • To understand how a electromagnetic calorimeter works. • To simulate the energy deposition spectra of photons in a calorimeter.

  5. Study of anomalous soft photons

  6. Soft photon distribution in CMS • Isotropical with energy distribution:

  7. SVD setup

  8. BGO crystals - capability to measure low energy deposit Emin<5MeV - the dimension of one cell 4 x 4 x120 cm3 - localization of photon σ < 2 cm.

  9. The electromagnetic calorimeter Red - BGO crystals Blue - organic scintillator - cutting the charged particles Green - Veto - energy leakages From GEANT

  10. Energy response of the calorimeter

  11. Detections of photons by BGO detector 50 GeV

  12. Signal and background

  13. Conclusion • In spite of small dimension of detector it allows one to detect low energy photons with small background contribution from high energy particles. • This is achieved due to VETO detector and measurement of location of incoming photons. • Signal of soft photons is detectable for cross section of several mb, according to the simulation.

  14. Thank you!

  15. Our SPG (soft photons generator) code • Generate total momentum of photons in CMS • Generate the direction of photons in CMS • Calculate the photons momentum in LS • Calculate energy of photons in LS

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