Difference between revisions of "Polarimeter 01 10 2011"
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| − | + | == Introduction == | |
| − | * | + | * Used standard Geant4 process <i>G4GammaConversion</i> with an optional <i>G4LivermorePolarizedGammaConversionModel</i> [[media:he_gamma_polarimetry.pdf | model for polarized photon conversion]] with all physics processes turned off for electrons and positrons. |
| + | * Simulated linearly polarized photon incident on 3mm thick radiator, the polarization is in the plane φ=0. (Note that this model seems to use half plane for photon polarization, may need to simulate with photon linear polarization with φ=180.) | ||
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| + | == Figures == | ||
| − | |||
| − | + | [[Image:pair_asym_110MeV.gif|thumb|350px|left|Azimuthal distribution of electrons from 110 MeV gamma conversions.]] | |
| − | [[Image:pair_asym_110MeV.gif|thumb| | + | |
<br/ clear="all"> | <br/ clear="all"> | ||
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<br/ clear="all"> | <br/ clear="all"> | ||
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| + | == Summary == | ||
| + | * Results for 110 MeV incident photon are consistent with the result from what was shown in the [[media:he_gamma_polarimetry.pdf | publication by the authors of the model]]. | ||
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| + | * Results for 4 GeV incident photon are consistent with the result from what was shown in the [[media:avakyan_hepex_1999.pdf | the studies by Yerevan group]]. | ||
| + | |||
| + | * Results for 9 GeV incident photon do not show any asymmetries. Not clear why this is the case. | ||
Latest revision as of 11:59, 10 January 2011
Introduction
- Used standard Geant4 process G4GammaConversion with an optional G4LivermorePolarizedGammaConversionModel model for polarized photon conversion with all physics processes turned off for electrons and positrons.
- Simulated linearly polarized photon incident on 3mm thick radiator, the polarization is in the plane φ=0. (Note that this model seems to use half plane for photon polarization, may need to simulate with photon linear polarization with φ=180.)
Figures
Summary
- Results for 110 MeV incident photon are consistent with the result from what was shown in the publication by the authors of the model.
- Results for 4 GeV incident photon are consistent with the result from what was shown in the the studies by Yerevan group.
- Results for 9 GeV incident photon do not show any asymmetries. Not clear why this is the case.
