  The Electron-Ion Collider is under construction at BNL. It will have
high-energy high-intensity polarized beams of electrons and hadrons. These
beams will allow a high accuracy investigation of nucleon structure in the low-
to very-low-x DIS regime. At the same time, similar to the realization at HERA,
these beams could be used with an internal target for a very productive
investigation of medium- to high-x nucleon structure. Due to a novel regime of
electron beam operation and its high polarization and intensity, the
Figure-of-Merit of an internal target experiment at EIC will be 500+ times
higher than was obtained by HERMES.
