|Message: GPS Cylindrical surface source : how to generate particules towards the outside of the cylinder?||Not Logged In (login)|
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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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