1 / 16

Simulation of soft photon calorimeter

Explore photon production, GEANT, PYTHIA, PAW simulation tools, calibrate electromagnetic calorimeter, study anomalies in soft photons, investigate soft photon distribution in CMS with BGO crystals, and detect low energy photons effectively.

phillip-todd
Télécharger la présentation

Simulation of soft photon calorimeter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related