INTERACTION REGION DESIGN FOR THE ELECTRON-LIGHT ION COLLIDER ELIC

The Electron-Light Ion Collider ELIC proposed by Jefferson Lab aims at a luminosity in the 1035 cm-2 sec-1 range for collisions of 150 GeV protons on 7 GeV electrons [1,2]. To achieve these high luminosities, very strong loW--β focusing of loW--emittance beams is required. Taking advantage of the unequal design proton beam emittances in the two transverse planes, an interaction region design based on superconducting quadrupole doublets has been developed. Compared with the original design in [2], this scheme provides larger beam apertures at lower magnetic fields, while potentially doubling the luminosity