Source at multiple locations

[weller]

think that is again a nice opportunity to make use of a loop:

Simulating different particle gun energies in a single run

You could use a loop: "make a macro file e.g kapis.mac and add the following /gun/energy {eKin} MeV /run/beamOn 100000 /control/shell youroutput.dat output_{eKin}.dat then in geant4 command line paste this: /control/loop kapis.mac eKin 10 100 20 assuming the initial energy denoted by variable ekin is 10kev and final is 100kev in steps of 20kev or so as you wish."

with the grid of coordinates, maybe you tweak it to be a nested loop