|Message: Re: General Particle source : Gun Alignement||Not Logged In (login)|
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Thank you so much for your reply. This tread helped me a lot, the spherical isotropic beam is now in the correct direction, i get now a fraction of neutrons after my setting geometry "collimator". But when i try to verify the position of the mother particles i get a strange parameter which i don't understand well, here are my settings:
#source spherique /gps/particle neutron
/gps/pos/centre 0. -50. 0. mm /gps/pos/radius 0.1 mm /gps/ang/type iso /gps/direction 0. 0. 1.
And i got something like (positions are for mother particles):
>>> Event 20 21 trajectories stored in this event. HepRepFile writing to G4Data20.heprep position = 0.0691829 -49.9684 3999.93 >>> Event 21 48 trajectories stored in this event. HepRepFile writing to G4Data21.heprep position = -0.0193878 -50.0564 3999.93 >>> Event 22 2 trajectories stored in this event. HepRepFile writing to G4Data22.heprep position = -0.0907053 -49.9872 3999.93 >>> Event 23 7 trajectories stored in this event. HepRepFile writing to G4Data23.heprep position = 0.0604199 -49.9388 3999.93
Please, do you have an idea why the z position have the same value "3999.93" for all events?
Many thanks Naima
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