Difference between revisions of "Beam Simulations"
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=== PS+TPOL simulations with 75 micron converter === | === 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: | ||
| + | *# A vs photon energy | ||
| + | *# A vs photon displacement at converter | ||
| + | *# 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 (?) | ||
| + | ** uncertainty on extracted A: 0.1% abs., 0.5% rel. | ||
| + | * time estimate: 100khr running on OSG | ||
| + | |||
| + | === 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: | ||
| + | *# A vs photon energy | ||
| + | *# A vs photon displacement at converter | ||
| + | *# 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 (?) | ||
| + | * time estimate: 100khr running on OSG | ||
| + | ** uncertainty on extracted A: 0.1% abs., 1% rel. | ||
| + | |||
=== PS+TPOL simualtions with 750 micron converter === | === PS+TPOL simualtions with 750 micron converter === | ||
Revision as of 10:05, 30 April 2018
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:
- A vs photon energy
- A vs photon displacement at converter
- 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 (?)
- uncertainty on extracted A: 0.1% abs., 0.5% rel.
- time estimate: 100khr running on OSG
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:
- A vs photon energy
- A vs photon displacement at converter
- 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 (?)
- time estimate: 100khr running on OSG
- uncertainty on extracted A: 0.1% abs., 1% rel.
