A2 Review article, Literature review, Systematic review
The Large Hadron–Electron Collider at the HL-LHC (2021)

Agostini, P., Aksakal, H., Alekhin, S., Allport, P.P., Andari, N., Andre, K. D. J., Angal-Kalinin, D., Antusch, S., Aperio, B. L., Apolinario, L., Apsimon, R., Apyan, A., Arduini, G., Ari, V., Armbruster, A., Armesto, N., Auchmann, B., Aulenbacher, K., Azuelos, G., . . . Zurita, P. (2021). The Large Hadron–Electron Collider at the HL-LHC. Journal of Physics G: Nuclear and Particle Physics, 48(11), Article 110501. https://doi.org/10.1088/1361-6471/abf3ba

JYU authors or editors

Publication details

All authors or editorsAgostini, P; Aksakal, H; Alekhin, S; Allport, P P; Andari, N; Andre, K D J; Angal-Kalinin, D; Antusch, S; Aperio, Bella L; Apolinario, L; et al.

Journal or seriesJournal of Physics G: Nuclear and Particle Physics



Publication year2021

Publication date01/11/2021


Issue number11

Article number110501

PublisherIOP Publishing

Publication countryUnited Kingdom

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/79575

Publication is parallel publishedhttps://arxiv.org/abs/2007.14491


The Large Hadron–Electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy-recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High-Luminosity Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent electron–proton and proton–proton operations. This report represents an update to the LHeC's conceptual design report (CDR), published in 2012. It comprises new results on the parton structure of the proton and heavier nuclei, QCD dynamics, and electroweak and top-quark physics. It is shown how the LHeC will open a new chapter of nuclear particle physics by extending the accessible kinematic range of lepton–nucleus scattering by several orders of magnitude. Due to its enhanced luminosity and large energy and the cleanliness of the final hadronic states, the LHeC has a strong Higgs physics programme and its own discovery potential for new physics. Building on the 2012 CDR, this report contains a detailed updated design for the energy-recovery electron linac (ERL), including a new lattice, magnet and superconducting radio-frequency technology, and further components. Challenges of energy recovery are described, and the lower-energy, high-current, three-turn ERL facility, PERLE at Orsay, is presented, which uses the LHeC characteristics serving as a development facility for the design and operation of the LHeC. An updated detector design is presented corresponding to the acceptance, resolution, and calibration goals that arise from the Higgs and parton-density-function physics programmes. This paper also presents novel results for the Future Circular Collider in electron–hadron (FCC-eh) mode, which utilises the same ERL technology to further extend the reach of DIS to even higher centre-of-mass energies.

Keywordsparticle physics

Contributing organizations

Ministry reportingYes

Reporting Year2021

JUFO rating2

Last updated on 2024-22-04 at 18:46