Linac*LHC based ep, gamma-p, eA, gamma-A and FEL gamma-A Colliders

TL;DR

This paper estimates the parameters and potential luminosities of various colliders based on a 1 TeV linear electron accelerator combined with the LHC, including ep, gamma-p, eA, gamma-A, and FEL gamma-A colliders, highlighting their scientific opportunities.

Contribution

It provides detailed parameter estimates and feasibility analysis for multiple collider configurations using a linear accelerator tangential to the LHC, including novel FEL gamma-A collision possibilities.

Findings

Achievable luminosity of 10^32cm^-2s^-1 for ep collisions at 5.29 TeV.

Potential for gamma-p collisions at 4.82 TeV with similar luminosity.

Feasibility of eA and gamma-A collisions with luminosity around 10^31cm^-2s^-1 for light and medium nuclei.

Abstract

Main parameters 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 estimated. It is shown that L_ep=10^32cm^-2s^-1 at sqrt(s_ep)=5.29 TeV can be achieved within moderate upgrade of LHC parameters. Then, gamma-p collider with the same luminosity and sqrt(s)=4.82 TeV can be realized using Compton backscattering of laser beam off the electron beam. Concerning the nucleus beam, L*A=10^31cm^-2s^-1 can be achieved at least for light and medium nuclei both for eA and gamma-A 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.