  The problem of "semi-bare electron" was first considered in frame of quantum
electrodynamics by E.L. Feinberg in 1980. In theory in frame of classical
electrodynamics this problem was touched on in articles of N.F. Shul'ga and X.
Artru. In 2008 the experimental investigations of this phenomenon in millimeter
wavelength region were started by the group of scientists, including authors of
this article. Used technique allowed us to study this effect in macroscopic
mode. In this paper we present the results of direct observation of a semi-bare
electron coulomb field recovery. The semi-bare state was obtained by passing of
electron beam through the hole in a conductive screen. Measured spatial
distribution of electromagnetic field shows the process of recover of the
electron coulomb field, which is followed by a forward radiation. The
experiments were performed on the relativistic electron beam of the microtron
of Tomsk Polytechnic University.
