un 2 00 0 Linac * LHC Based ep , γ p , eA , γ A and FEL γ - A Colliders : Luminosity and Physics

Main parameters and physics goals 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 discussed. It is shown that L ep =10 32 cm-2 s-1 at √s ep =5.29 TeV can be achieved within moderate upgrade of LHC parameters. Then, γp collider with the same luminosity and √s=4.82 TeV can be realized using Compton backscattering of laser beam off the electron beam. Concerning the nucleus beam, L * A=10 31 cm-2 s-1 can be achieved at least for light and medium nuclei both for eA and γA 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.