The proposed Large Hadron-electron Collider and the Future Circular Collider in electron-hadron mode allow the study of DIS in the TeV regime.
These facilities will provide electron-hadron collisions, with instantaneous luminosity around $10^{34}$ cm$^{-2}$ s$^{-1}$ in electron-proton case, by colliding a 50 GeV electron beam from a highly innovative energy-recovery linac system with the LHC/FCC hadron beams, concurrently with other experiments for hadron-hadron collisions.
The detector design was updated in the 2020 Conceptual Design Report.
Ongoing developments since then include an improved interaction region design, reflecting state-of-the-art synchrotron radiation simulations, together with a more detailed study of an all-silicon central tracking detector.
Additional capabilities for particle identification, enabling improved semi-inclusive DIS and eA studies, are also underway.
In this article, we describe the current detector design and ongoing discussion in the framework of a new ep/eA study being carried out on behalf of CERN, highlighting areas of common interest with other future collider experiments and the new Detector R\&D Collaborations in Europe.