Difference between revisions of "Beam Simulations"
From GlueXWiki
(→PS+TPOL simulations with 75 micron converter (2017-2018 geometry)) |
(→PS+TPOL simulations with 750 micron converter) |
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[[File:hsect_750_1e9.png|right]] | [[File:hsect_750_1e9.png|right]] | ||
− | === PS+TPOL simulations with 750 micron converter === | + | === PS+TPOL simulations with 750 micron converter (2017-2018)=== |
* 750um beryllium converter | * 750um beryllium converter | ||
* photon beam energy 8.0 - 8.8 GeV. | * photon beam energy 8.0 - 8.8 GeV. |
Revision as of 08:25, 6 July 2018
PS+TPOL simulations with 75 micron converter (2017-2018)
- 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: ~5 M
- resource estimate: 100khr running on OSG, final sample size ~2.2GB
- expected uncertainty on extracted A: 0.1% abs., 0.5% rel.
- final generated statistics:
- events generated (pairs + triplets): 15,017,600,000
- TPOL+PS coincidences recorded: 6,949,740
- root://nod25.phys.uconn.edu/Gluex/beamline/pairsim/5-2018/tpolskim_75um_6-26-2018.hddm
PS+TPOL simulations with 750 micron converter (2017-2018)
- 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: ~5 M
- resource estimate: 100khr running on OSG, final sample size ~2.6GB
- expected uncertainty on extracted A: 0.1% abs., 1% rel.
- final generated statistics:
- events generated (pairs + triplets): 12,429,600,000
- TPOL+PS coincidences recorded: 7,315,373
- root://nod25.phys.uconn.edu/Gluex/beamline/pairsim/5-2018/tpolskim_750um_6-26-2018.hddm