Beam Simulations

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PS+TPOL simulations with 75 micron converter

  • 75um beryllium converter
  • photon beam energy 8.0 - 8.8 GeV.
  • coherent bremsstrahlung spectrum, edge at 8.8 GeV.
  • GlueX beamline geometry, 5mm collimator, 60um diamond radiator.
  • 11.6 GeV electron beam @ 150 nA, 5e-8 m.rad emittance, 0.5mm virtual spot r.m.s.
  • 100% PERP polarization on every beam photon, otherwise GlueX beam properties.
  • tagger simulation with randoms included over interval [-10, +10]ns.
  • background photons included from 1 MeV to endpoint energy.
  • sufficient statistics to cut on variables to study systematics:
    1. A vs photon energy
    2. A vs photon displacement at converter
    3. A vs pair energy asymmetry, PS edge effects
  • rough estimate of statistics:
    • total events generated: 10,000 M
    • total events with PS trigger: 3,100 M
    • total PS triggers with in-time TPOL hits: 12 M
    • total events passing TPOL analysis cuts: ~2 M (?)
  • resource estimate: 100khr running on OSG, final sample size 10GB
  • expected uncertainty on extracted A: 0.1% abs., 0.5% rel.
  • LINK TO GENERATED DATASET (yet to come)

PS+TPOL simulations with 750 micron converter

  • 750um beryllium converter
  • photon beam energy 8.0 - 8.8 GeV.
  • coherent bremsstrahlung spectrum, edge at 8.8 GeV.
  • GlueX beamline geometry, 5mm collimator, 60um diamond radiator.
  • 11.6 GeV electron beam @ 150 nA, 5e-8 m.rad emittance, 0.5mm virtual spot r.m.s.
  • 100% PERP polarization on every beam photon, otherwise GlueX beam properties.
  • tagger simulation with randoms included over interval [-10, +10]ns.
  • background photons included from 1 MeV to endpoint energy.
  • sufficient statistics to cut on variables to study systematics:
    1. A vs photon energy
    2. A vs photon displacement at converter
    3. A vs pair energy asymmetry, PS edge effects
  • rough estimate of statistics:
    • total events generated: 10,000 M
    • total events with PS trigger: 3,100 M
    • total PS triggers with in-time TPOL hits: 20 M
    • total events passing TPOL analysis cuts: ~2 M (?)
  • resource estimate: 100khr running on OSG, final sample size 10GB
  • expected uncertainty on extracted A: 0.1% abs., 1% rel.
  • LINK TO GENERATED DATASET (yet to come)



Link to original Beam Simulations page