Montag, C. Bassi, G. Beebe-Wang, J. Berg, J.S. Blaskiewicz, M. Fedotov, A.V. Fischer, W. Hao, Y. Hershcovitch, A. Luo, Y. Palmer, R.B. Parker, B. Peggs, S. Ptitsyn, V. Ranjbar, V.H. Seletskiy, S. Shaftan, T.V. Smaluk, V.V. Tepikian, S. Willeke, F.J. Witte, H. Wu, Q. JACoW Geneva, Switzerland 978-3-95450-180-9 10.18429/JACoW-NAPAC2016-TUPOB56 English 616-618 TUPOB56 ion electron proton luminosity dipole Contribution to a conference proceedings 2017 2017-01 http://dx.doi.org/10.18429/JACoW-NAPAC2016-TUPOB56 https://jacow.org/napac2016/papers/tupob56.pdf The ring-ring version of the eRHIC electron-ion collider design aims at providing electron-proton collisions with a center-of-mass energy ranging from 32 to 141 GeV at a luminosity reaching 10³³ cm⁻² sec⁻¹. This design of the double-ring collider also supports electron-ion collisions with similar electron-nucleon luminosities, and is upgradeable to 10³⁴ cm⁻² sec⁻¹ using bunched beam electron cooling of the hadron beam. The baseline luminosities are achievable using existing technologies and beam parameters that have been routinely achieved at RHIC in hadron-hadron collisions or elsewhere in e⁺e⁻ collisions. This minimizes the risk associated with the challenging luminosity goal and is keeping the technical risk of the e-RHIC electron-ion collider low. The latest design status will be presented.