&track long center_on_orbit = 0; long center_momentum_also = 1; long offset_by_orbit = 0; long offset_momentum_also = 1; long soft_failure = 1; long use_linear_chromatic_matrix = 0; long longitudinal_ring_only = 0; long stop_tracking_particle_limit = -1; &end
center_on_orbit-- A flag indicating whether to center the beam transverse coordinates on the closed orbit before tracking.
center_momentum_also-- A flag indicating whether to center the momentum coordinate also.
offset_by_orbit-- A flag indicating whether to offset the transverse beam coordinates by the closed orbit before tracking. Similar to
center_on_orbit, but the initial centroids of the beam are preserved. The beam is simply displaced by the closed orbit rather than being centered on it.
offset_momentum_also-- A flag indicating whether to also offset the beam momentum to the momentum of the closed orbit. If the
start_from_dp_centroidparameters are used on the
closed_orbitcommand, this flag should be set to 0; otherwise, one will offset the beam central momentum by its own value.
soft_failure-- If there is an error during tracking (e.g., a failure of orbit correction), continue to produce file output. This creates essentially empty slots in the files corresponding to the failed steps.
use_linear_chromatic_matrix-- For each particle, a first-order matrix is computed for the particular momentum offset of the particle using the linear chromaticity and linear dependence of the beta functions on momentum.
longitudinal_ring_only-- Tracks longitudinal coordinates only for a ring.
stop_tracking_particle_limit-- If a non-negative is given, then elegant will stop tracking when the number of particles falls below the given value. It will be as if all the particles were lost.