Dear Matt & Dave, I really appreciate your support! I was not aware of the existence of DMSwarm object and it has been a really exiting discovery, since in our research group we have people working with kind of PIC methods and I suppose that they will be grateful for your work Dave!
Concerning my problem, I will give your suggestions a try! I’ll write you back if I miss some technical points with using the new features of DMSwarm. Thank you again, Francesco