  New computational tools are essential for accurate modeling and simulation of
the next generation of muon-based accelerators. One of the crucial physics
processes specific to muon accelerators that has not yet been simulated in
detail is beam-induced plasma effect in liquid, solid, and gaseous absorbers.
We report here on the progress of developing the required simulation tools and
applying them to study the properties of plasma and its effects on the beam in
muon ionization cooling channels.
