HES HKS meeting
4/8/2010T.Gogami
Today’s talk
GEANT4 spherical uniform distribution (HES)
12ΛB g.s. width
simulation
Particle distribution around target
r=1 [cm]
2/24/201
0
HESPrimaryGeneratorAction.cc
input/sample.in θ , Δθ , φ , Δφ
θΔθ
Δθ
min maxa
Δa Δa
check
θ = 0.3 ± 0.3 [rad]φ = 0 ± π [rad]
θ = 0.5 ± 0.2 [rad]φ = 0 ± π [rad]
check
θ = 0.4 ± 0.3 [rad]φ = 0.5 ± π/2 [rad]
works well
HES solid angle using new code(spherical uniform distribution)
with Collimator : 5 [msr]without Collimator: 7 [msr]
12ΛB g.s. width is wider than
others
generatedmain peak event num. = 1300 = Nsecond peak event num. = N/3resolution = 500 [keV]background : peak max. = 1 : 4
[MeV]
[MeV]
[MeV]
[MeV]
Width(1σ) (FWHM)497.5 – 559.9 [keV] mean(1σ)35.52 – 62.46 [keV]
generatediterated num. = 10000All event num. = 700 = Nsecond peak event num. = N/3second peak pos. = +150 [keV]resolution = 500 [keV]background : peak max. = 1 : 4
12ΛB g.s. width is wider than others
まとめ & to do まとめ
(GEANT4)spherical uniform distribution for HES HES solid angle ~7 [msr] (without collimator) 12
ΛB g.s. Simulation (+150 [keV] , resolution 500 [keV](FWHM))
Width(1σ) (FWHM) 497.5 – 559.9 [keV] To do
(GEANT4) spherical uniform distribution for HKS solid angle matrix
Real data EH2 …
backup
EPhi vs. ETheta
12ΛB g.s. width is wider than
others
generatedmain peak event num. = 1300 = Nsecond peak event num. = N/2resolution = 500 [keV]background : peak max. = 1 : 4
[MeV]
[MeV]
[MeV]
[MeV]
12ΛB g.s. width is wider than
others
generatedmain peak event num. = 1300 = Nsecond peak event num. = Nresolution = 500 [keV]background : peak max. = 1 : 4
[MeV]
[MeV]
[MeV]
[MeV]
Width(1σ) (FWHM)483.0 – 542.8 [keV] mean(1σ)19.81 – 46.31 [keV]
generatediterated num. = 10000All event num. = 700 = Nsecond peak event num. = N/3second peak pos. = +100 [keV]resolution = 500 [keV]background : peak max. = 1 : 4
12ΛB g.s. width is wider than others
Width(1σ) (FWHM)317.6 – 583.8 [keV] mean(1σ)50.8 – 78.4 [keV]
generatediterated num. = 10000All event num. = 700 = Nsecond peak event num. = N/3second peak pos. = +200 [keV]resolution = 500 [keV]background : peak max. = 1 : 4
12ΛB g.s. width is wider than others
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