CPU efficient numerical code for charged particle transport through insulating straight capillaries
Abstract
A numerical code, labeled InCa4D, used for simulating CPU-efficiently the guiding of charged
beam particles through insulating straight nano or macro capillaries, is presented in detail. The
paper may be regarded as a walk through the numerical code, where we discuss how we compute the
charge deposition and charge dynamics at the interfaces of a straight capillary and how we compute
the electric field with imposed boundary conditions. The latter add surface polarization charges at
the dielectric interfaces and free charges at conducting interfaces. Absorbing boundary conditions
allow for a leakage current. As a result, the electric field in InCa4D yields accurate relaxation rates
and decay rates for both cases, namely where the outer surface of the straight capillary is covered
by a grounded conducting paint or not. Eventually, we show how we sample the initial conditions of
the inserted beam particles and how we evaluate CPU-efficiently the particles’ trajectory, allowing
to compute typically 106 trajectories in about two hours on a modern CPU.
Origin : Files produced by the author(s)
licence : CC BY - Attribution
licence : CC BY - Attribution
