|Message: Re: How to generate more primary particles simultaneously (in a particle bunch) ?||Not Logged In (login)|
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> If I follow the procedure described, the particles are indeed generated > within a single event, but at random time intervals...
This is news to me! All primary particles are generated at time = 0s unless the user specifically asks that they have a defined time off-set, with:
What if you forced the time to be zero before each invocation of GeneratePrimaryVertex?
I just looked. The G4ParticleGun has a G4ParticleGunMessenger:
sets the particle gun's time to zero:
So, I don't understand why you're seeing them start at different times. I even followed the G4 logic all the way to where G4Tracks are made. The vertex time is properly propagated.