An experiment for electron-hadron scattering at the LHC

Abstract Novel considerations are presented on the physics, apparatus and accelerator designs for a future, luminous, energy frontier electron-hadron ( eh ) scattering experiment at LHC in thirties which key physics topics their relation to hadron-hadron HL-LHC programme discussed. Demands derived set by these design of LHeC detector, corresponding update is described. Optimisations design, especially interaction region (IR), presented. Initial indicate that common IR possible be built alternately could serve hh collisions while other experiments would stay either condition. A forward-backward symmetrised option detector sketched permit extending also include aspects physics. The vision joint shown open new prospects solving fundamental problems high heavy-ion including partonic structure nuclei emergence hydrodynamics quantum field theory genuine TeV scale DIS unprecedented rank.