2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183324A new detector concept (R2D) is needed to harvest the unique physics opportunities at RHIC-II during the LHC era. This concept is based on a high granularity hermetic array of detectors featuring high momentum particle identification and superior resolution for photon and onium measurements. Most components of R2D can also be applied to future electron-ion interactions. Thus, R2D allows us to perform precision QCD-type measurements at RHIC-II and eRHIC.4 pages, 1 figure, Quark Matter 2005 conference proceedingsNuclear Experimenttext