  The wakefield and stopping power of an ion-beam pulse moving in magnetized
plasmas are investigated by particle-in-cell (PIC) simulations. The effects of
beam velocity and density on the wake and stopping power are discussed. In the
presence of magnetic field, it is found that beside the longitudinal conversed
V-shaped wakes, the strong whistler wave are observed when low-density and
low-velocity pulses moving in plasmas. The corresponding stopping powers are
enhanced due to the drag of these whistler waves. As beam velocities increase,
the whistler waves disappear, and only are conversed V-shape wakes observed.
The corresponding stopping powers are reduced compared with these in isotropic
plasmas. When high-density pulses transport in the magnetized plasmas, the
whistler waves are greatly inhibited for low-velocity pulses and disappear for
high-velocity pulses. Additionally, the magnetic field reduces the stopping
powers for all high-density cases.
