beginning[beta_a] = 100
beginning[beta_b] = 100
beginning[e_tot] = 5e8
parameter[geometry] = open

b1: sbend, l = 1, rho = 10, csr_method = 1_dim
b2: sbend, l = 2, rho = 10, csr_method = 1_dim
d1: drift, l = 1, csr_method = 1_dim

lat: line = (b1, d1, b2)

use, lat