The 70k 'Ditkys' muons in 'particles_endm4m5_100.txt' are propagated from the end of the M5 line through backleg, fringe, inflector including scattering in end coils.
About 32k survive. The distribution of the survivors is in 'MARK_INFLECTOR_DS_phase_space.dat'
The twiss parameters of the distribution at the entrance to the backleg are tuned to optimize transmission.
Longitudinal distribution is 120ns 'W'