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TY - CONF AU - Seletskiy, S. AU - Blaskiewicz, M. AU - Drees, K.A. AU - Fedotov, A.V. AU - Fischer, W. AU - Gassner, D.M. AU - Hulsart, R.L. AU - Kayran, D. AU - Kewisch, J. AU - Mernick, K. AU - Michnoff, R.J. AU - Miller, T.A. AU - Robert-Demolaize, G. AU - Schoefer, V. AU - Song, H. AU - Thieberger, P. AU - Wanderer, P. ED - Yamazaki, Yoshishige ED - Raubenheimer, Tor ED - McCausey, Amy ED - Schaa, Volker RW TI - Precise Beam Velocity Matching for the Experimental Demonstration of Ion Cooling With a Bunched Electron Beam J2 - Proc. of NAPAC2019, Lansing, MI, USA, 01-06 September 2019 CY - Lansing, MI, USA T2 - North American Particle Accelerator Conference T3 - 4 LA - english AB - The first ever electron cooling based on the RF acceleration of electron bunches was experimentally demonstrated on April 5, 2019 at the Low Energy RHIC Electron Cooler (LEReC) at BNL. The critical step in obtaining successful cooling of the Au ion bunches in the RHIC cooling sections was the accurate matching of average longitudinal velocities of electron and ion beams corresponding to a relative error of less than 5·10⁻⁴ in the e-beam momentum. Since the electron beam kinetic energy is just 1.6 MeV, measuring the absolute e-beam energy with sufficient accuracy and eventually achieving the electron-ion velocity matching was a nontrivial task. In this paper we describe our experience with measuring and setting the e-beam energy at LEReC. PB - JACoW Publishing CP - Geneva, Switzerland SP - 356 EP - 359 KW - electron KW - factory KW - beam-cooling KW - acceleration KW - dipole DA - 2019/10 PY - 2019 SN - 2673-7000 SN - 978-3-95450-223-3 DO - doi:10.18429/JACoW-NAPAC2019-TUZBB3 UR - http://jacow.org/napac2019/papers/tuzbb3.pdf ER -