  We intend to propose an experimental sketch to detect gravitational waves
(GW) directly, using an cold electronic plasma in a long pipe. By considering
an cold electronic plasma in a long pipe, the Maxwell equations in 3+1
formalism will be invoked to relate gravitational waves to the perturbations of
plasma particles. It will be shown that the impact of GW on cold electronic
plasma causes disturbances on the paths of the electrons. Those electrons that
absorb energy from GW will pass through the potential barrier at the end of the
pipe. Therefore, crossing of some electrons over the barrier will imply the
existence of the GW.
