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Keywords: Partially charged ions
Forum: Particles
Re: None Partially charged ions (Jean Claude Thiry)
Re: None Re: Partially charged ions (Vladimir IVANTCHENKO )
Date: 27 Apr, 2007
From: Jean Claude Thiry <jean-claude.thiry@ulp.u-strasbg.fr>

Hi,

Thanks a lot for you answer. That's what I'm doing right now. But meanwhile I've got another issue:

I try to add a mass and a charge distribution to the ions I shoot. So I thought the best way to do so was to define the particle in the PrimaryGeneratorAction::GeneratePrimaries part of the PrimaryGeneratorAction.cc. So I declare the gun in the constructor:

ZrGun = new G4ParticleGun(1);

and then I define the particle in the GeneratePrimaries part:

ZrGun->SetParticleDefinition(ionTable->GetIon(ZrZ,ZrA,0.0));

where ZrA and ZrZ are the mass and effective charge drawn randomly within a gaussian distribution.

But when doing do, I get the following error message after the 18th event:

### Run 0 start. G4SteppingManager::GetProcessNumber: ProcessManager=0 for particle=Ca140[0.0], PDG_code=1000201400 G4SteppingManager::GetProcessNumber: Process Manager is not found.

obviously this has nothing to do with the random generation, as I get the same error even for fixed values (where the ParticleDefinition is still set in the GeneratePrimaries part), but after less shots.

The workaround I'm using right now is to define particleguns for all needed particles, and then I chose randomly which particlegun should be fired for each event. The problem is that this is very annoying, as I have to define about 500 guns for my distributions. Isn't there a better way to do that?

Best Regards

Jean Claude Thiry

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1 None: Re: Partially charged ions   (Vladimir IVANTCHENKO - 27 Apr, 2007)
1 None: Re: Partially charged ions   (Jean Claude Thiry - 09 May, 2007)
3 None: Re: Partially charged ions   (Jean Claude Thiry - 22 Jan, 2008)
1 None: Re: Partially charged ions   (Vladimir IVANTCHENKO - 29 Jan, 2008)
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