/control/verbose 0
/tracking/verbose 0
/event/verbose 0
/run/initialize
/gps/verbose 2
/gps/particle gamma
/gps/type Plane
/gps/shape Square
/gps/centre 1. 2. 1. cm
/gps/halfx 2. cm
/gps/halfy 2. cm
/gps/angtype cos
/gps/energytype Lin
/gps/emin 2. MeV
/gps/emax 10. MeV
/gps/gradient 1.
/gps/intercept 1.
/run/beamOn 10000