Overview of the eRHIC Ring-Ring Design

The ring-ring electron-ion collider eRHIC aims at an electron-ion luminosity in the range from 10 to 10 cm−2sec−1 over a center-of-mass energy range from 30 to 140 GeV. To minimize the technical risk the design is based on existing technologies and beam parameters that have already been achieved routinely in hadron-hadron collisions at RHIC, and in electron-positron collisions elsewhere. This design has evolved considerably over the last two years, and a high level of maturity has been achieved. We will present the latest design status and give an overview of studies towards evaluating the feasibility.