  The study of charged particle dynamics in the combined gravitational and
magnetic field can provide important theoretical insight into astrophysical
processes around black holes. In this paper, we explore the charged particle
dynamics in parabolic magnetic field configuration around Schwarzschild black
hole, since the paraboloidal shapes of magnetic field lines around black holes
are well motivated by the numerical simulations and supported by observations
of relativistic jets. Analysing the stability of bounded orbits and using the
effective potential approach, we show the possibility of existence of stable
circular off-equatorial orbits around the symmetry axis. We also show the
influence of radiation reaction force on the dynamics of charged particles, in
particular on the chaoticity of the motion and Poincar\'{e} sections,
oscillatory frequencies, and emitted electromagnetic spectrum. Applied to
Keplerian accretion disks, we show that in parabolic magnetic field
configuration, the thin accretion configurations can be either destroyed or
transformed into a thick toroidal structure given the radiation reaction and
electromagnetic-disk interactions included. Calculating the Fourier spectra for
radiating charged particle trajectories, we find that the radiation reaction
force does not affect the main frequency peaks, however, it lowers the higher
harmonics making the spectrum more flat and diluted in high frequency range.
