#set pol c+
#otf 840 890 1 delay 5
#file Ni_plus
#start
set_pol_cplus(offset = None)
wait_beam()
set_file('Ni_plus')
otf(start=840, end=890, time=1, delay=5)

#set pol c-
#otf 840 890 1 delay 5
#file Ni_minus
#start
set_pol_cminus(offset = None)
wait_beam()
set_file('Ni_minus')
otf(start=840, end=890, time=1, delay=5)