/run/initialize
####
##########################
#define incident particle
/gps/particle proton

##########################
# Monoenergetic parallel proton beam
##########################

/gps/pos/shape Circle
/gps/pos/centre 0. 0. 1. cm
/gps/pos/radius 1. mm
/gps/pos/sigma_r 0.3. mm

/gps/pos/type Beam
#
/gps/ang/type beam1d 
/gps/ang/sigma_r 0.1 deg
#
/gps/ene/type Gauss
/gps/ene/mono 60 MeV
/gps/ene/sigma 0.2 MeV

/run/beamOn 10