no_digested
beginning[beta_a]  = 10  
beginning[beta_b]  = 12

parameter[geometry] = open
beginning[p0c]  = 2e5

particle_start[x] = 0e-4
particle_start[px] = 1e-4
particle_start[z] = 0.123e-3

!

d: drift, l = 1
rf: lcavity, l = 1, rf_frequency = 1e9, gradient = 1e6, phi0 = 0.1, ds_step = 0.001

lat: line = (d, rf)

rf3: lcavity, l = 1, rf_frequency = 3e9, gradient = 1e6, phi0 = 0.1, ds_step = 0.001
lat3: line = (d, rf, rf3, rf, rf3)
lat3[beta_a] = 10
lat3[beta_b] = 10
lat3[geometry] = open

use, lat, lat3