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Re: Stepsize in TPC Simulation with new external packages [message #5524 is a reply to message #5521]

Wed, 28 November 2007 17:53

Mohammad Al-Turany
Messages: 518
Registered: April 2004
Location: GSI, Germany

first-grade participant

From: *gsi.de

Hallo Sebastian:

Quote:

I just tried with G4 now. There is a stepsize limitation now. But it is 0.005 cm and it appears not to be correlated with what I put into the media file.

Hm... any idea?

As far as I can see if I change the STEPMAX in the media file I can see it in TGeoManager and Also in TG4GeometryManager. In VMC_G4 only the STEPMAX can be set now, so if it is not enough for you we can ask Ivana about this.

So in my media file I put:

TPCmixture 3 20.1797 12.01 15.9994 10. 6. 8. 0.001 0.9 0.0 33 0.067
1 1 20. 0.001
99. 0.0775 0.0001 0.0000777
0

then I put this print out in the TG4GeometryManager:

G4cout << "Adding medium Id=" << mediumId << " name=" << mediumName << " limits=" << limits << " StepMax " << stemax << " StepMax cm "
<< stemax*cm << G4endl;

And As output I get:

Adding medium Id=8 name=TPCmixture limits=0x99c07a0 StepMax 0.0775 StepMax cm 0.775

which correspond exactly to what I put inside the media, and cm in G4 is 10 so the last number is also ok.

So it seems that it works as it is done. Is this now a problem for you that you cannot set the minimum step size yourself? should we discuss with Ivana about this and why she set only the maximum step?

Mohammad

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[Message index]

		Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Tue, 27 November 2007 15:40
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Tue, 27 November 2007 16:45
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Tue, 27 November 2007 20:27
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Tue, 27 November 2007 23:50
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Wed, 28 November 2007 11:35
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Wed, 28 November 2007 13:30
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Wed, 28 November 2007 15:53
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Wed, 28 November 2007 17:53
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Wed, 28 November 2007 20:07
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Thu, 29 November 2007 18:58
		Re: Stepsize in TPC Simulation with new external packages By: Viola Michael on Fri, 30 November 2007 17:17
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Mon, 03 December 2007 14:28
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Mon, 03 December 2007 16:49
		Re: Stepsize in TPC Simulation with new external packages By: Sebastian Neubert on Thu, 13 December 2007 15:11
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Thu, 13 December 2007 15:30
		Re: Stepsize in TPC Simulation with new external packages By: Viola Michael on Thu, 13 December 2007 15:45
		Re: Stepsize in TPC Simulation with new external packages By: Mohammad Al-Turany on Fri, 14 December 2007 08:47
		Re: Stepsize in TPC Simulation with new external packages By: Viola Michael on Fri, 14 December 2007 12:57

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