2011 JINR, DUBNA Student Practice. Vaclav Kosar Czech Technical University in Prague Viktor Burian...
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Transcript of 2011 JINR, DUBNA Student Practice. Vaclav Kosar Czech Technical University in Prague Viktor Burian...
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2011
JINR, DUBNAStudent Practice
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Vaclav Kosar Czech Technical University in Prague
Viktor Burian Czech Technical University in Prague
Andra-Georgia Ibanescu University of Bucharest
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Igor Rufanov
Elena Kokoulina
Vladimir Nikitin
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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.
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Isotropical with energy distribution:
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- capability to measure low energy
deposit Emin < 5MeV
- the dimension of one cell
4 x 4 x 120 cm3
- localization of photon σ < 2 cm.
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Red - BGO crystals
Blue - organic scintillator - cutting the charged particles Green - Veto - energy leakagesFrom GEANT
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50 GeV
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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.
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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
)/)0(exp(0 Arandpp
)5.0)0((*2,, randzyx 222 zyxr rxppCMS /*
)2,1()2,1( CMSLS pp )**
()3( pvr
zpp CMSLS
)3()2()1( 222
LSLSLSpppELS