2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/195863The investigation of lepton-hadron and photon-hadron collisions at TeV scale is crucial both to clarify the strong interaction dynamics from nuclei to quark-parton level and for adequate interpretation of experimental data from future hadron colliders (LHC and VLHC). In this presentation different TeV scale lepton-hadron and photon-hadron collider proposals (such as THERA, LEP-LHC, QCD Explorer etc) are discussed. The advantages of linac-ring type colliders has been shown comparatively.Presented at PAC05, 16-20 May 2005, Knoxville, TN, USAHigh Energy Physics - ExperimentHigh Energy Physics - PhenomenologyAccelerator Physicstext