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Geant 3, Geant 4 VMC, native geant 4 comparison [message #5940]

Fri, 22 February 2008 12:20

Dima Melnychuk
Messages: 213
Registered: April 2004
Location: National Centre for Nucle...

first-grade participant

From: *fuw.edu.pl

Hi again,

I put here a couple of plots that demonstrate difference in deposited energy for Geant3, Geant4 VMC and native Geant4.

So cluster_energy_full.jpg - index.php?t=getfile&id=4193&private=0

is energy deposited from 1GeV photon in emc barrel (theta=50, phi=0-360).

And it is comparable with energy deposited in EmcTest setup (5x5 PbWO4 crystals), implemented by Stefano.
index.php?t=getfile&id=4194&private=0

So around 5% of energy is lost somewhere for Geant4 and it doesn't come from complicated emc geometry.

But with native Geant4 application
index.php?t=getfile&id=4195&private=0

deposited energy is similar to Geant3 VMC and close to the value calculated by Jan in Babar framework for the whole EMC.
http://tau.ep1.rub.de/HyperNews/get/SimGenDisc/2159/1/1/1/1/1.html

So the difference doesn't come from the different Geant4 version
4.7 in Babar framework vs. 4.9 in pandaroot (which I also used in native Geant4 application).

So the source of difference is still under investigation,

Dima

Attachment: cluster_energy_full.jpg
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Attachment: cluster_energy_test.jpg
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Attachment: cluster_energy_g4.jpg
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[Message index]

		Geant 3, Geant 4 VMC, native geant 4 comparison By: Dima Melnychuk on Fri, 22 February 2008 12:20
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: StefanoSpataro on Fri, 22 February 2008 13:02
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Dima Melnychuk on Fri, 22 February 2008 13:30
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Johan Messchendorp on Fri, 22 February 2008 13:38
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Dima Melnychuk on Fri, 22 February 2008 13:42
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Johan Messchendorp on Fri, 22 February 2008 13:45
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Mohammad Al-Turany on Mon, 25 February 2008 21:26
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Johan Messchendorp on Mon, 25 February 2008 21:43
		Re: Geant 3, Geant 4 VMC, native geant 4 comparison By: Mohammad Al-Turany on Mon, 25 February 2008 22:43

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