slic_particle_gun.mac

/generator/select gps
/gps/verbose 2

/gps/pos/type Volume
/gps/pos/shape Cylinder
/gps/pos/centre 0. 0. 0. cm
/gps/pos/radius 6.360 m
/gps/pos/halfz 4.95 m

# confine by volume
#/gps/pos/confine det_envelope
/gps/ene/type Mono
/gps/ene/mono 10 GeV
/gps/particle mu-
/gps/direction 0 1 0