Liu, C. Fedotov, A.V. Fuchs, A. Gassner, D.M. Gu, X. Kayran, D. Kewisch, J. Miller, T.A. Minty, M.G. Ptitsyn, V. Seletskiy, S. Sukhanov, A. Weiss, D. JACoW Publishing Geneva, Switzerland 978-3-95450-201-1 10.18429/JACoW-IBIC2018-WEPB21 English 486-489 WEPB21 emittance electron cavity optics solenoid Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-IBIC2018-WEPB21 http://jacow.org/ibic2018/papers/wepb21.pdf Low Energy RHIC electron cooling (LEReC) [1] is the first bunched electron cooler, designed to cool low energy ion beams at RHIC. The beam quality, including the transverse beam emittance, is critical for the success of cooling. The transverse electron beam emittance was characterized with a multi-slit and moving-slit device at various locations in the beamline. The beam emittance measurement and analysis are presented in this report.