High Energy Physics: Geant4

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High Energy Physics Geant4

• September 24, 2007
• By Michelle Potts
• Supervisor Yasar Onel

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Generic Light Guides

• Research for future projects in high energy
  physics
• Goal To develop an equation for the efficiency
  of light guides based on certain parameters

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Generic Light Guides

• Litrani
• Developed by member of CMS as a general
  simulation for the propagation of optical photons
• Extracted data from Litrani using
• root
• Inconsistencies

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Generic Light Guides

• Combat inconsistencies
• Geant4

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Photomultiplier Tubes

• When subject to light, turns the light into an
  electric signal and it multiplies the signal,
  then the output signal is measured

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Photomultiplier Tubes

• Research the after pulse phenomena in PMTs
• When there is some amount of gas insidethe PMT
  the gas molecules will be ionized unintentionally
  and this will affectthe behavior of the output
  signal

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Photomultiplier Tubes

• Geant4 Simulations

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Photomultiplier Tubes
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Conclusions

• Generic Light Guide Simulations
• Continue the development of generic light guide
  simulations using geant4 and compare with
  experiment results
• Photomultiplier Tubes
• Continue the development of PMT simulations