Brookhaven National Laboratory U.S. Department of Energy USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26) Collider Accelerator Department January 2016 F. Meot eRHIC ERL modeling in Zgoubi BNL-111832-2016-TECH EIC/49;BNL-111832-2016-IR Notice: This technical note has been authored by employees of Brookhaven Science Associates, LLC under Contract No.DE-SC0012704 with the U.S. Department of Energy. The publisher by accepting the technical note for publication acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world- wide license to publish or reproduce the published form of this technical note, or allow others to do so, for United States Government purposes.