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Forum: Particles
Re: Question GPS(GeneralParticleSource) on hemisphere volume (Wonmo)
Date: 28 Jun, 2011
From: michel maire <michel maire>

On Tue, 28 Jun 2011 01:40:23 GMT, Wonmo wrote:
> Dear all
> 
> Some part of my GPS scripts are
> 
> /gps/pos/type Volume
> /gps/pos/shape Sphere
> /gps/pos/radius 0.17 mm
> /gps/pos/centre 0. 0. 0. mm
> /gps/ang/type iso
> 
> I want to distribute source points on the HEMISPHERE VOLUME instead of
> sphere. Isotropic emission is still required.
> 
> I tried to find solution in GPS user manual. But "Biasing" is not what I
> need because I still want isotropic emission but source must be
> distributed on the hemisphere. Yet I don't know exactly what the
> "Confine" is. But it seems that "confine" does not change sphere
> distribution of sources when I visualized.
> 
> Please give me any hint to solve this problem.
> I really appreciate your help in advance.
> Cheers
> 
> Wonmo
> 

 examples/extended/eventgenerator/particleGun shows how to do that, with simple particleGun, not GPS

    Michel

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