Corsika data check (iron)


ECUTS: 1 TeV, MinEnergy: 100 GeV

Results

primary particle energy

ECUTS thres 1 TeV

Dot line: without cut
normal line: with DOM#>80

primary particle energy weighted by the CR flux

ECUTS thres 1 TeV

Dot line: without cut
normal line: with DOM#>80

cos(zenith angle) of the primary particle.

Dot line represents events whose hit DOM number above 80. (high energy events)

cos(zenith angle) of the primary particle weighted by hte CR flux.

Dot line represents events whose hit DOM number above 80. (high energy events)

azimuth angle of the primary particle.

cos(zenith angle) of the primary particle Vs the energy.

ECUTS thres 1 TeV

larger dots represents events whose hit DOM number above 80. (high energy events)

Multiplicity of muons

ECUTS thres 1 TeV

Dot line: without cut
normal line: with DOM#>80

Multiplicity Vs primary energy

cos(Zenith angle) Vs Multiplicity of muons

Multiplicity of muons weighted by the CR

Dot line: without cut
normal line: with DOM#>80

Energy distribution at IceCube detector (in ice)

Dot line: without cut
normal line: with DOM#>80

Energy distribution at IceCube detector (in ice) weighted by the CR flux

Dot line: without cut
normal line: with DOM#>80

Energy in ice Vs primary energy

cos(zenith angle) Vs energy in ice

Energy distribution at surface

ECUTS thres 1 TeV

Dot line: without cut
normal line: with DOM#>80

Energy distribution at surface weighted by the CR flux

Dot line: without cut
normal line: with DOM#>80

Energy at surface Vs primary energy

Energy at surface Vs energy in ice

The zenith angle dependence

Black: cos(zenith angle) < 0.2
Blue: 0.2 < cos(zenith angle) < 0.4
Red: 0.4 < cos(zenith angle) < 0.6
Magenda: 0.6 < cos(zenith angle)< 0.8
Water: 0.8 < cos(zenith angle) < 1.0

Horizontal particles loose the energy at high energy. This is probably due to limited simulation volume (880m radius), but I think this is fine because those particles beyond the volume will not make so many photons that can reach our detector, but I will check this more.

cos(zenith angle) Vs energy at surface

Energy at surface Vs energy in ice

There is a constant energy loss during the propagation from surface to the detector (~log10(0.2)~30%)

Energy at surface Vs energy in ice

The zenith angle dependence

Black: cos(zenith angle) < 0.2
Blue: 0.2 < cos(zenith angle) < 0.4
Red: 0.4 < cos(zenith angle) < 0.6
Magenda: 0.6 < cos(zenith angle)< 0.8
Water: 0.8 < cos(zenith angle) < 1.0

Horizontal particles loose the energy more during the propagation.

Npe distribution at IceCube detector (in ice)

ECUTS thres 1 TeV

Dot line: without cut
normal line: with DOM#>80

Npe distribution at IceCube detector (in ice)

ECUTS thres 1 TeV

Dot line: without cut
normal line: with DOM#>80

Npe Vs in-ice bundle energy

Cos(zenith angle) Vs Npe in ice

Cos(zenith angle) Vs Npe in ice


Comaprison with observational data

Npe distribution (corresponding to ~62 days)

Corsika data is much less than observed.

data: black
MC: red

Npe distribution (zenith angle dependence, corresponding to ~62 days)

Dot: observational data
Line: corsika data

black: 0 < cos(ZA) < 0.25
Red: 0.25 < cos(ZA) < 0.5
green: 0.5 < cos(sZA) < 0.75
blue: 0.75 < cos(ZA) < 1.



Keiichi Mase
Last modified: Sat Apr 5 21:13:12 JST 2008