  Main parameters of different colliders which can be realized if a special 1
TeV energy linear electron accelerator or corresponding linear collider is
constructed tangential to LHC are estimated. It is shown that
L_ep=10^32cm^-2s^-1 at sqrt(s_ep)=5.29 TeV can be achieved within moderate
upgrade of LHC parameters. Then, gamma-p collider with the same luminosity and
sqrt(s)=4.82 TeV can be realized using Compton backscattering of laser beam off
the electron beam. Concerning the nucleus beam, L*A=10^31cm^-2s^-1 can be
achieved at least for light and medium nuclei both for eA and gamma-A options.
Finally, colliding of the FEL beam from an electron linac with nucleus beams
from LHC will give a new opportunity to investigate nuclear spectroscopy and
photo-nuclei reactions.
