  We have investigated electro-magnetic (EM) wave pulses in a jet from a
neutrino driven accretion flow (NDAF) around a black hole (BH). NDAFs are
massive accretion disks whose accretion rates of $\dot{M}\approx 0.01 - 10
\mathrm{M}_\odot/\mathrm{s}$ for stellar-mass BHs. Such an extreme accretion
may produce a collimated relativistic outflow like a magnetically driven jet in
active galactic nuclei and micro-quasars. When we consider strong toroidal
magnetic field stranded in the inner-region of a NDAF disk and magnetic
impulses on the jet, we find that they lead to the emanation of high energy
emissions for gamma-ray bursts as well as high energy cosmic rays. When
Alfv\'enic wave pulses are generated by episodic immense accretions, it
propagates along the large-scale structured magnetic field in the jet. Once the
Alfv\'enic wave pulses reach at nearly the speed of light in the underdense
condition, it turns into EM wave pulses which produce plasma wakes behind them.
These wakefields exert a collective accelerating force synchronous to the
motion of particles. As a result, the wakefield acceleration premises various
observational signatures, such as pulsating bursts of high energy gamma-rays
from accelerated electrons, pulses of neutrinos from accelerated protons, and
protons with maximum energies beyond $10^{20}~\mathrm{eV}$.
