A High-Brillance Angstrom-FEL based on the LHeC

The Large Hadron electron Collider (LHeC) is a proposed future particle physics project colliding
60 GeV electrons from a recirculating energy-recovery linac (ERL) with 7 TeV protons stored in the
LHC. The ERL technology allows for much higher beam current and, therefore, higher luminosity
than a traditional linac. The high-current high-energy electron beam can also be used to drive a free
electron laser (FEL). In this study we investigate the performance of an LHeC based FEL, operated
in the self-amplified spontaneous emission mode, for which we choose a final electron beam energy
of 40 GeV and aim for X-ray wavelengths of less than 1 ˚A. We demonstrate that such FEL would
have the potential to provide orders of magnitude higher peak power, peak brilliance and average
brilliance, than any other FEL either existing or proposed.