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Question GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder? 

Forum: Particles
Date: 20 Mar, 2013
From: Jérôme Roccaz <Jérôme Roccaz>

Hi everyone,

I've define a cylindrical neutron source with GPS. This source is a surface, as I want neutrons to be generated on the surface of this source. i've checked and that part seems OK.

I want the neutrons to go from the source toward the other part of the geometry, and not toward the inside of the cylinder. To check that i've defined a cylindrical volume surrounded by the cylindrical source and look at interactions within this volume. So if all things go ok, I should have no interaction within this volume.

i've read several things to limit the angle emission and tried all of them like :

/gps/ang/type cos /gps/ang/mintheta 90. deg /gps/ang/maxtheta 180. deg

I've tried with /gps/ang/surfnorm true

I've also tried test32.g4mac ... but none of these methods works : I have interaction within the cylindrical volume.

So someone has a way do to it?

thanks a lot

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1 Idea: Re: GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder?   (Gumplinger Peter - 20 Mar, 2013)
1 None: Re: GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder?   (Michael H. Kelsey - 21 Mar, 2013)
2 None: Re: GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder?   (michel maire - 22 Mar, 2013)
3 Sad: Re: GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder?   (Jérôme Roccaz - 22 Mar, 2013)
1 Feedback: Re: GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder?   (Gumplinger Peter - 22 Mar, 2013)
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