WG2005
BNL, Upton, Long Island, New York, USA
We present a lattice design of future ERL-based electron-hadron collider eRHIC and BNL version of the lattice design LHeC . In eRHIC, an six-pass ERL installed in the existing Relativistic Heavy Ion Collider (RHIC) tunnel will collide 5-30 GeV polarized electrons with RHIC's 50-250 (325) GeV polarized protons or 20-100 (130) GeV/u heavy ions. In BNL's version for LHeC, a stand-along 3-pass 60 GeV CW ERL will collide polarized electrons with 7 TeV protons. The multiple arcs are made of Flexible Momentum Compaction lattice (FMC) allowing adjustable R56 parameter. The multiple arcs, placed above each other, are matched to the linacs straight sections with splitters and combiners. Other important eRHIC lattice components have been developed: quadrupole-less linac optics; by-pass lines around the detectors and the pass lengthening insertion (needed to match the bunch frequencies of the electrons and hadrons in wide hadron energy range).
