This invention provides a fast calculation method for beam transport in a de-energizer section based on the
transfer matrix and Monte Carlo method, relating to the field of beam
physics. The method includes: Step 1, constructing a
transfer matrix model of the beam transport section before the de-energizer based on the beam optical parameters and optical element parameters at the starting point of the beam transport line, obtaining the particle
phase space distribution parameters at the de-energizer inlet; Step 2, establishing a three-dimensional structural model of the de-energizer based on the particle
phase space distribution parameters at the de-energizer inlet and performing Monte Carlo beam transport
simulation of the de-energizer section, obtaining the position,
momentum, and
energy information of the beam particles at the de-energizer outlet; Step 3, performing
outlier data removal
processing on the position,
momentum, and
energy information of the beam particles at the de-energizer outlet, obtaining processed particle data. This invention achieves high-precision reconstruction of Monte Carlo particle information into optical parameters, improving the
simulation efficiency of beam transport lines containing de-energizer structures.