/run/initialize /gun/position 0 0 -100 /gun/direction 0 0 1 /tracking/verbose 1 /gun/energy 200 MeV /gun/particle e+ /run/beamOn 1 /gun/energy 1 TeV /gun/particle mu+ /run/beamOn 1 /tracking/verbose 0 /gun/energy 200 MeV /gun/particle e+ /run/beamOn 10000 /gun/energy 1 TeV /gun/particle mu+ /run/beamOn 1000 exit